imagine a world with buildings that can ride out earthquakes; bacteria that make gasoline; tiny devices that repair individual cells, even dna; gossamer threads strong enough to hold up a bridge; or an elevator to the stars. these visions of the future are based in the discoveries of today, as a new science of materials emerges from the elemental building blocks of the universe, promising a future in which we can create virtually
anything we want atom by atom. [horn honks] i'm david pogue... do you have trash around here? yep, absolutely. you can throw it right in. ...and i'm on a quest to turn garbage into gold - okay, maybe not literally gold - more like turning trash into electricity... eighty-eight thousand homes are being fueled by their own trash?
.....corn into cars;.... this is growing your own car parts. i think you've been smoking too many mushrooms. ...bags into batteries. chicken feathers in your gas tank. no, no come back. come back. i got you. i'm not going to hurt you. stay calm. it's science. material scientists are taking tips from mother nature... everybody clear the building. it's going to blow!
...to turn worthless waste into stuff we can use, stuff that disappears when we're done with it. and everybody's getting in on the act. i think this is the car of the future. this is how we'll all be getting around: electric. this is the car of the future? we're on the road to a zero-waste world, all part of making stuff cleaner, right now, on nova. major funding for nova is provided by the following:
and the corporation for public broadcasting and viewers like you. thank you. major funding for making stuff is provided by the national science foundation. additional funding is provided by: the world's manufacturer of engineered and advanced materials. i've got to confess, watching these powerful machines do their thing is a guilty pleasure. i love the aluminum foil heat protector he puts on the windshield.
do you think he's got fuzzy dice too? the engines in some of these cars put out 450 horsepower and can easily hit 200 miles an hour. apparently it's got great pickup and the least storage in its class. i'm david pogue. i write about technology for the new york times. usually i stick to gadgets like laptops and cameras, but these meet my most fundamental journalistic criteria:
i want one! cars represent power and freedom but also waste. while they're up and running, these monsters eat up gasoline and spit out carbon, which heats up our atmosphere, all the while just going around in circles. and when they crash, like most cars,
they turn into broken down heaps. many of their parts wind up permanently parked in landfills. that's because much of the stuff that goes into cars is plastic. both waste problems - petroleum and plastic - converge on cars. and both break mother nature's golden rule: we can have what we want, as long as we clean up after ourselves. for example, my plant and i are in perfect harmony.
i breathe in oxygen and breathe out carbon dioxide. she takes in carbon dioxide and puts out oxygen. together we make a beautifully efficient circle of life. imagine if all the stuff we use could be paired in such perfect harmony. that's called a zero-waste world. my mission is to uncover some cool stuff to get us there, starting with cars. i decided to consult with one of the foremost experts,
well, at least one of the funniest, jay leno. most people don't know it, but this is jay's day job: restoring antique automobiles. his collection of nearly 200 cars spans 100 years of history, from a humble 1941 fire engine to a ritzy 1925 doble steam-powered convertible, once owned by howard hughes... it's like a giant furnace on wheels.
this is 2,000,000 btus of heat. ...from classic american muscle cars, to a jet-powered sports car. every car here is street-legal, and jay likes to drive a different piece of history home each night. when you're in show business, you have drugs, women or find something else to do. this is something else to do. while doing his something else,
jay has become a guru of auto technology, and he's got some insider info on the car of tomorrow. this is how we'll all be getting around: electric. well, this is a 1909 baker electric. uh, there's no pollution. this was high tech back in the day. talk about back to the future. the 1909 baker runs on energy stored in batteries.
wow. you have six batteries in front. as with today's electric cars, you charge the batteries by plugging the car in. i'm going to stop exactly at 10 bucks. but in those days, electric cars were commonplace. there were charging stations all over new york city. this is one of the original charging stations. sort of like frankenstein,
you'd throw these levers... [evil laugh] and electricity would surge through. would you have to laugh like that to get it to work? yeah, you had to laugh. [evil laugh] you had to do that every time. see, that's one other reason that it died. people just hated doing... [evil laugh]... doing that every, every single time. that got to be very annoying. everbody's a comedian.
you want to go for a ride and see what it's like? yeah! this runs? you don't take it on.... of course it runs. you seem so stunned by... i like this. you've got the user's manual on the seat. that's a good, good sign. yeah, but i'll show you how, sort of, maintenance-free these are. all you do is turn the key, [bell dings] and you are, uh.... that's the wheel?
...ready to go. [bell dings] oh, my god. no way. it's a great ride. really quiet because there's no roaring engine, just the hum of an electric motor. so in this car, i see a meter down there. that's you, your fuel gauge so to speak? volts and amperage, yeah. what's your top speed in the baker?
twenty-two. twenty-two? just right for l.a. traffic jams. don't forget, though, when this car was built, the speed limit was 12. [laughs] i mean that's what it was. there was no paved roads. i mean you had cobblestones, so... [bell dings] a fully charged battery is good for 60 to 100 miles, more than enough for an excursion around early 1900's manhattan.
nobody really went much out of manhattan. only rich people had these; and taxicabs. they'd run for three or four hours, go back to the, uh, charging station, take another car while that was being charged. so, it worked out quite well. well, at least until you wanted to drive anywhere outside of new york, because for providing power on the go, batteries just can't beat gasoline. gasoline is almost the perfect fuel.
a gallon of gas gives you so much power, even though you need this much battery to get the power of this much gasoline. if the electric cars of the 21st century are to avoid the fate of the 1909 baker electric, they'll need a better battery. this seems to be the future, but you know, electricity is like sex: people have no compulsion about lying about it.
[laughter] you know? i mean every electric field i get, "oh, this will go a hundred miles." well, 48 miles later, i'm stuck by the side of the road. but it's no lie that more juice and a longer lasting charge are essential in a battery. in all batteries, electricity is created by a chemical reaction. there are two metals, called electrodes, that want to exchange electrons.
but between them is a third material, called an electrolyte, that keeps the electron transfer in check. but, if we give those electrons an easier path from one electrode to the other,like through a circuit, say the bulb in your flashlight or the electronics in your phone, the flow begins, creating an electric current. in a car battery, the electrodes are made of lead and lead dioxide, and the electrolyte is sulfuric acid. that's enough juice to spark ignition
and to power forklifts and golf carts, but not the engine of a car. they just don't hold or put out enough power. electricity is like an animal. you put it in a jar and it either escapes or it dies. you take a battery that's fully charged and you put it on the shelf, you come back in three weeks, the electricity went away.where'd it go? but now scientists are mixing up materials to get more bang out of batteries,
like zero to 60 in less than a second... ...packing the power of 150 car batteries onto this small frame. the wobble you see in the picture is our tv camera's way of saying, "whoa!" with over 500 horsepower, this bike is one of the fastest electric motorcycles in the world. its battery pack could easily power an electric car. and i know where this baby comes from! the facility we're about to visit has been considered by some
the global headquarters for the future of electric vehicles in america. [dog barking] i just hope i can make it through security. the juice we're looking for may be here, in suburban denver, hidden behind this garage door. here it is. looks like you guys are into bikes or something. yeah, we like electric ones, that's for sure. bill dube and eva hakansson are the ceo's, vp's of r. and d., actually everything from a to z,
at an electric motorcycle company called killacycle. not the normal motorcycle. no. i know that my hog looks very different from this. does it? yeah. bill has agreed to share the top secret technology responsible for killacycle's world speed record. it's just a giant cordless drill with wheels. [laughter] you're a colorful man, bill. it is! a giant cordless drill, okay.
it's that simple. it has a battery, which we can take out of here, right? it has a motor. and it has a throttle, right? okay? this has the battery down here, right? it has the motors, right here. and it has a throttle. okay, but what makes the killacycle faster than an electric drill is the battery.
more than a thousand of them live underneath this panel. bill and eva make them fit underneath by welding individual cells together. they get the batteries from a company called a123 systems. and the reason a123 can pack so much punch into these little cells is because of the stuff they make them with. instead of the lead used in traditional car batteries, they use lithium. lithium is a great choice because its atoms are so small.
it's the third smallest element on the table of the elements. smaller atoms means more flowing electrons and more electricity that can be generated by the battery, but what makes these a123 batteries even better is the internal structure of the electrodes. there are so many nano-scaled nooks and crannies, they provide more pathways for electrons to move through the battery and into the wires. that means more power,
faster charging and a longer lifespan. bill has a different explanation. he calls it "the slurpee and the straw." with a slurpee, you have a certain amount of juice in the cup. that's the specific energy. okay. the energy it holds is how much juice there is in the cup. then, the power is the size of the straw. so the battery's storage capacity is like a super-concentrated slurpee,
and its high power output is like shooting the juice with a lot of pressure through a really wide straw, all in a small compact container. it's unbelievable. cells this big around putting out more power than these big cells. it's.... no wonder you're cackling like a madman. and no wonder these killacycles are some of the fastest electric bikes in the world.
but there is one last question that i have been dying for them to ask. so, do you want to take one of our electric bikes for a ride? yeah. okay, let's go out here. not this one? no, not that one. let's get it out of the race trailer for you. it's in here? oh, yeah. oh, oh, oh! my motorcycle is in the trailer behind that exercycle?
no, this is the one we're going to have you ride. you've got to start somewhere. everyone's a comedian. bill assures me that you just pedal it to get started. it's not quite the same thing. okay, here we go. vroom, vroom! you have to supply the noises with your mouth. bye, guys. i'm off to the market.
this is not electric. oh, my god. whoa! oh, my god! you want to tell me how it works? jeez! you didn't really explain how you stop it. [yelling] [crashing][laughing] clearly, i'm not ready for the big bikes. with that much power stored in such a small space,
could these supercharged lithium batteries supply the juice we need for electric cars? the batteries do have a few drawbacks. they're still expensive, and like petroleum, lithium is a limited resource. but a123 is opening the largest lithium automotive battery factory in the u.s. right outside the motor city, detroit. so if electric vehicles catch on, these little guys could be the next big thing.
but there could be an even more radical solution to the power problem, using one of the most abundant materials in the universe: hydrogen. general motors has about 100 of these hydrogen-powered suvs out on the road. they're being test driven by ordinary folks, ordinary folks aaaaannnd jay leno! i've been driving this for two years,
and it's fantastic! it is zero emissions, not point one per billion, zero! and when jay says "zero," he means zero! i mean, if you went into the garage, shut the garage door, sealed it, turned on the engine, and sat in this car, you would starve to death before anything else happened to you. jay offers to show me where the magic happens.
oh, man! not a lot to look at. not going in here with your screwdriver. no, but as you can see, there's a lot of technology here. and it's american technology, which i like. the technology he's talking about is called a fuel cell. like a battery, a fuel cell creates electricity through a chemical reaction. the fuel, in this case, is hydrogen, which the fuel cell combines with oxygen from the air.
the result? electricity to run a motor. nothing comes out the tailpipe but a little water vapor. those are the kind of emissions we could live with. all right, come on, let's go. and for people who drive a lot, like stephanie white, no pollution is great, and great mileage is even better. so this is my old car: about 30 miles to the gallon.
come here. hop in. good boy. ...and the chevy fuel cell hydrogen vehicle: about 55 miles to the gallon. the hope is that someday hydrogen won't cost any more than gasoline does today, and your mileage will double. that clean, economical future is one reason why stephanie applied to be a test consumer in general motors' project driveway,
a program that puts hydrogen fuel cell cars into real world conditions. but there are a few problems. getting hydrogen into a usable form takes energy, and right now there's only a handful of places to fill up. while the process looks familiar, it requires very different equipment since the hydrogen has to be pumped into the tank under pressure. the system pressurizes the tank to a certain level, and then it switches to another tank that's at higher pressure.
so it goes about four times, and that brings it up to 10,000 p.s.i. speaking of hydrogen under pressure, remember the hindenburg? that was the german hydrogen blimp that exploded with 97 people on board. hydrogen may not have had anything to do with the fire; it may have been the skin of the blimp that fueled the flames, but hydrogen still makes people nervous.
a more realistic problem is how far the hydrogen car will go on a tankful. right now, it's only about 250 miles, which is not as far as a tankful of gas will take you, but materials scientists may have a solution to that problem. here it is folks. the future of american hydrogen storage: [rooster crows] chickens!
or, more specifically, their feathers. you see, there's this scientist in delaware... here we go. a little hydrogen lift here. ...who says if we cook the feathers at just the right temperature, we can turn them into high-tech hydrogen storage devices. this is, uh, how your students get around town? they're riding on pure hydrogen, zero waste output. and zero waste output is exactly what professor richard wool is after.
he gave me a quick primer on hydrogen and chicken feathers. hydrogen is a gas that likes to be free. it likes to occupy a lot of space. and so, to compress it into a small space, like the size of your gas tank, you know, 20 gallons, requires enormous pressures. take a look at the hydrogen tank on top of this bus. it's almost as big as the bus itself! so how can we get more hydrogen into less space
without a lot more pressure? that's where the chicken feathers come in. so the chicken feathers are like a sponge and draws the hydrogen gas closer, and that drops the pressure in the tank. so richard took me to the nerve center of his research to show me how his feathered friends are helping him with the solution to the storage issue. well, this is my plant.
this is where i grow the materials for, uh... your plant? hi, guys, we're back. before we can catch the hydrogen, we've got to catch the chicken. uh, i've never caught a chicken, but it can't be all that hard. it's very easy. i'll show you. you need to walk over very slowly.
slowly, okay. oh, no, no. come back, come back. i've got you. i'm not going to hurt you. i'm not going to hurt you! everybody stay calm. it's, it's science. arghhh! you, right there, right there. stay. i almost had it. so this is a feather. you see the quill and then you see the hairs.
and the hairs are hollow. and when you heat up the hollow hairs, they become nanoporous. that means they have lots of really, really small pores that provide more places to store hydrogen atoms with less pressure. but there's a more basic question. but why chickens? i mean surely there are bigger bird breeds with better feathers. we could do this with any bird;
it's just a question of the volume of raw materials. the chicken is the largest processed bird in the u.s.a., and there's about six billion pounds of waste material. wait, wait. they throw away the feathers? they throw away the feathers. i know; it's upsetting to me too. richard figures he can recycle these wasted feathers into a storage material for hydrogen fuel. can you say hydrogen? hydrogen?
he took me along to his lab to show me how they do it. first, they remove the quills. they are left with the fluffy feather fiber. so what we do here is we take this feather fiber and then we heat them up to this much higher temperature, and that's when we get an enormous increase in surface area. and so, this black carbonized chicken feather fiber then becomes this sponge, to soak up hydrogen. when you heat them to 750 degrees fahrenheit,
the chicken feathers become over 200 times more absorbent, because trillions of tiny little caves developed in the fiber. you got it: nanopores. they give the hydrogen atoms a place to nestle. in theory, this material could fit enough hydrogen into a normal-sized gas tank to allow 300 miles of travel between fill ups and almost no pressure. but cooking chicken feathers?
it seems like a lot of trouble and steps to go from the chickens to the stuff we're putting in our hydrogen cars. isn't there some man-made synthetic way that would be faster, just as good? oh, you can. you can absolutely make these using things like carbon nanotubes and other materials. the difference is that this process is almost for free, whereas the carbon nanotubes and other such materials would cost you the equivalent of about
a million dollars for your gas tank. [david laughs] yeah, that would put a small damper on car sales in this country. so these are cheap, cheap, cheap. if we want to make hydrogen a viable fuel, richard wool and his fine-feathered friends may have found a cleaner way, and all for the cost of chicken feed. cars with electric motors, fueled either by hydrogen or super-charged batteries,
could cut the cord to gasoline. but once upon a time, gas-fueled cars were seen as a way out of another environmental hazard: horse pollution. and if you don't believe me, you can hear it straight from the freakishly knowledgeable comedian's mouth. the car was seen as the great savior of the american horse because in, in the early 1900s you had thousands of tons of horse manure on the streets of new york every day.
people dropping dead from dysentery and, and just the smell. if the horse collapsed in the street, they just cut the reins, and they'd walk, and they'd leave a dead carcass. so, consequently, you had new york city garbage men and stuff going around, picking up hundreds of dead horses in new york city every day. the horses literally worked to death. so when the car came along, oh, my god, this was the,
as i said, the great savior. instead of horse manure you get a little puff of blue smoke occasionally, and that didn't seem so bad. yeah, until millions of gas-powered cars started spewing blue smoke filled with lead, sulfur and other pollutants. over the last 50 years we've cleaned up a lot of these toxic pollutants. today, we're mainly left with invisible carbon emissions that are a by-product of burning gasoline
and a contributor to global warming. as jay reminds me, this is not the fault of our cars and engines, the problem is the fuel. you know, there's nothing wrong with internal combustion engines. we just don't happen to like the fuel. why throw away 150 years of proven technology? internal combustion works; we just don't like the fuel or the byproduct. so, change the fuel and the byproduct.
wait, does jay know something we don't? is it possible to run our internal combustion cars with a fuel that doesn't come from oil? materials scientist jay keasling has created genetically modified bacteria that do just that: they eat plants and make gas. these microbes are miniature chemical factories that take in something very inexpensive, like a sugar, and turn it into something really valuable, like a fuel.
a fuel like gasoline. my plant can explain. her body, like all living things, is made from carbon. when her ancestors died, millions of years ago, they took the carbon in their bodies with them safely underground. over the years, that carbon fossilized and became oil. when we burn this fossil fuel, we rapidly release millions of years of buried carbon back into the atmosphere, contributing to global warming.
but jay's process is carbon-neutral. his microbes make liquid fuel from plants that are growing now, absorbing carbon from the atmosphere. it's called "biofuel," and, unlike ancient fuel, burning biofuel doesn't add any new carbon to the atmosphere. it's got all the power of fossil fuel, without the fossils. so if you think about the infrastructure that we have in the u.s., if we can make fuels that are identical to the petroleum-based fuels, then we can use all of that infrastructure for this new fuel.
existing biofuels have been criticized because they're made from food crops, like corn. but jay's microbes can eat stuff we can't, like switchgrass and wheat chaff. and the gas they make is good to go as diesel, right into our cars, trucks, and trains. it doesn't have to be refined, which takes energy. okay, biofuel, better batteries and hydrogen: three cleaner alternatives to petroleum.
but i'm the gadget guy, and even i don't know which one to choose. i defer to my car guru who says the innovation that takes us there, will be obvious only in hindsight, and won't catch on until we're ready. i remember when i was a kid, in 1964, we went in to buy a new ford, and my dad said to the salesman, "does this car have seat belts?" and the salesman: "seat belts? hey, louie, we got a race car driver here. he wants seat belts. what, are you going to crash?
what are you a bad driver? we got a driver, what? you going to go 100 miles per hour?" just humiliated my father. you know you can't, you can't sell something before its time. in time, clean technology will be like seat belts, standard equipment. and solving the petroleum fuel problem in cars will drive us a long way down the road to a zero-waste world. petroleum makes a powerful fuel. there's a lot of energy stored in the strong atomic bonds
between hydrogen and carbon. for that reason it's also used to produce super strong material, starting where the rubber meets the road. the stuff in our tires? we call it rubber, but it's really not. real rubber comes from trees. this stuff is a synthetic material made with petroleum. it's one of the hardest materials to break down. that's good for driving but bad in a zero-waste world.
but my nose tells me there's something different about these babies. i understand that these tires have something more than plain black rubber in them. that is correct. they actually have orange oil in them. orange oil? yes. just to give them a zesty citrus aroma for the race? no, we haven't gone that far to provide an actual natural orange oil smelling tire.
but what we've done is we've replaced petroleum oil with orange oil. so it reduces our petroleum footprint. so it's an eco-friendly racing tire. and eco-friendly tire, so, less, petroleum in these tires? regular tires use about a barrel of oil per tire. mixing in orange oil reduces that petroleum use by 20%. and while reducing petroleum use is good, replacing it with bio-degradable orange oil is better. best is when that replacement material
was getting thrown away anyway. so, pretty cool; you're rescuing orange peels from the landfill, and you're using them to replace petroleum in actual useful products. but that's a very high-tech use of oranges. you want to know what a good low-tech use of orange is? sure. breakfast. great, thank you. imagine if eco-friendly ingredients could
replace more eco-economy car parts, beyond tires. it's an idea almost green enough to eat. okay, so this is a, uh, attractive car. i can't say it looks any greener than any other car, but you're telling me there's something green about this car that last year's model didn't have. this is a 2011 ford fiesta, and we're just launching this vehicle. what i'm most proud of...it has the soy foam seats in it. it has sea foam? soybean foam.
so, we replaced the petroleum materials with soybean oil. give it a try. let me know what you think. professional cushion tester, david pogue. and in cars, the cushions are just the tip of the plastic iceberg. yeah, it, it feels, like a car seat. it feels comfortable. now, look around you. do you see anything that's not plastic? oh, my gosh. plastic, plastic, plastic, plastic, plastic. everywhere. yeah.
about 300 pounds of plastic in an average american car. the problem with plastic as a material goes deep, like, to a molecular level. plastic is a polymer, chains of carbon, hydrogen and oxygen atoms that are so strong, it takes bacteria thousands of years to decompose them. plastic achieves this unnatural invincibility because, a) it's made from petroleum and b) it just ain't natural.
it's a man-made molecule, the first stuff in the history of the world that is totally synthetic. materials scientist leo bakeland invented it in 1907. he became a very rich man. originally called bakelite, the name didn't last as long as the material. first, bakelite found a foothold in industry as wire insulation, high precision gears, and even machine guns. eventually, it caught on with consumers as
jewelry, rotary dial telephones, radios, and, yes, car parts. today its descendants are everywhere,but that may change. ford is already replacing 10% of that petroleum-based plastic with stuff that's much easier to digest: food. i look at this and i don't say to myself "car seat." how, how does something like this get to be plastic? we take the soybeans and we press them,
and you get soybean oil. so, instead of using hard-to-decompose petroleum-based plastic, ford is substituting soy and other vegetable oils to make bio plastic. fifty grams, all right. going to mix it for 30 seconds. and after we're done with this can i have a blueberry smoothie? other than the ingredients, there's not much difference in the process.
oh, my god. everybody clear the building! it's gonna blow! the soy foam is taking over. ford is using bio-plastic not only in soft foam seats, but also for hard plastic surfaces like the dashboard. and they're making other car parts from stuff that's left over from harvesting wheat. 80% of all plastic car parts are made using an injection mold process.
the difference here is the wheat. it seems like a scene from willy wonka. [evil laugh] the machine takes a wheat-straw-plastic mixture, melts it, and pushes it into a mold. the mold cools and pops out a plastic part. so we've gone from this to this in 400 easy steps. this is just a test strip, but this bin for the ford flex is made of wheat grass.
it decomposes, it's carbon-neutral, and it's already saving tons of petroleum a year. even this small part on only the flex conserves about 30,000 pounds of petroleum each and every year. and there's actually more than one way to mold car parts. they can actually be grown. this is mushroom mycelium, so, the root of a mushroom plant. wait, wait, this stuff is made from mushrooms? yes, so what happens.... come on.
this is really cool. ford mixes a little mushroom mycelium together with some other plant matter, like the wheat straw, and they put the mixture into a mold shaped like a car part. they close the mold and the mushroom mycelium grows because it's feeding on the plant matter. after about a week, it's filled the mold, they take it out, and it's in the shape of a car part. just cover it with a little bio-plastic and it's ready to go.
okay, now, i think you've been smoking too many mushrooms. growing cars from plants is the ultimate green auto technology, but the proof of the pudding is in the driving. shall we see what she's got? going to be some bumps. whoa! and yes, folks, the soy-based seat cushions are performing well at 40 miles an hour. on the road to cleaner stuff, reducing the use of a limited resource
and replacing it with stuff that can be replenished, makes a lot of sense. and it could have a surprising added benefit. there's a handy bonus if you're ever, like, crashed on a desert island, and there's nothing to eat, you can always go for a little soybean. i don't think so. mixing plant-based ingredients into plastics is a tasty idea, especially to mother nature.
she's got an appetite for decomposing organic things, like plants and animlas, you know? ashes to ashes, dust to dust. but, we're never going to eat our way through the world's plastic waste. we produce more than 300 million tons of plastic every year. of this smorgasbord, only a third can be replaced with bioplastics. the rest of our plastic buffet is artificially flavored with, polyethylene, polypropylene and polystyrene. these materials are called thermoplastic,
the flimsy petroleum-based stuff that's so cheap we throw it away: milk bottles, plastic bags, cups, bottles, knives, forks and packing peanuts. but some materials scientists are dreaming of transforming cheap plastic bags into valuable stuff. that kind of alchemy is what's cooking here. chief wizard in charge is vilas pol. what are you some kind of james bond villain? uh, do you want to cook your plastic?
oh, boy, do i! all day i've been saying i want to cook my plastic. so let's do that. now, my mom always told me you don't put plastic bags in the fire because it releases poisonous chemicals, and that's true. if you just heated the plastic on the stove, carbon-based chemicals like benezene could get into the air, creating a cancer risk.
but vilas has created a thermoplastic reactor, a closed system that uses extreme heat to break down the chemical bonds and transform the resulting carbon into a valuable material. the recipe is simple: cut many plastic bags of any color into small pieces,.... okay, i feel like the environmental martha stewart here. .....put the pieces into the reactor, add a pinch of cobalt acetate.
[high voice] you, you want to try not to spill. set the temperature to 1,400 degrees fahrenheit, insert the reactor, throw the switch, and cook for three hours. okay, so three hours have elapsed, and we're going to take a look at what you've cooked up. okay. it looks a lot like black powder,
but vilas has another name for it: carbon nanotubes. nanotubes are 1/50,000 the thickness of a human hair, conduct electricity 10 times more readily than many metals, and store five times as much energy. that led vilas to find a really practical application for his plastic-bag-formulated nanotubes: batteries. he coats very thin slices of copper with the former plastic bag material,
adds lithium and layers them with plastic spacers. my experience with this is limited to, like, ham, swiss and turkey. you'll have to forgive me. he squeezes it all into a little case, and when we test it.... okay. i touch it, and look at that! two dollars and eighty-nine cents. no, that is a voltage. that's the voltage, okay. but vilas isn't stopping here with these little power cells. he's already producing rechargeable lithium batteries for cell phones.
he calls this process - transforming wasteful plastic bags into valuable batteries - "upcycling." he could be ready within the next year to go into large-scale production. not only could upcycling help solve the plastic waste problem; it could also make someone a fortune. won't you be the guy who becomes the billionaire? uh, hopefully me and you. [laughter]
we'll talk about the investments later. but while upcycling may be a giant mind-shift toward cleaner stuff, it's just one small step toward a zero-waste world. in fact, if we could eliminate all plastic and all carbon emissions from all the cars in the world, we would still be only a third of the way there. by far, the biggest contributor to our energy problem comes from very close to home.
in fact, it is our homes and the places we work. every time you turn on a light, you draw electricity from the "grid" - a complex network that delivers electricty to homes, offices and factories. and when the fuel that makes that electricty is coal, oil or even natural gas, more of those planet-warming carbons pour into our atmosphere. here is peekskill, new york,
the wheelabrator plant burns trash instead of fossil fuel to make electricity. hey. hi, dave. how are you doing? okay, how are you doing? nice to meet you. do you have a trash around here. yep, absolutely, you can throw it right in. this is our fuel. the main purpose is to change the energy form from trash into energy. what about all the nasty emissions you get from burning garbage? well, wheelabrator has figured out that if your burn garbage
hot enough, long enough, in a nearly closed system, then almost no carbon or pollutants are released into the atmosphere. the furnace is designed to burn around 2,000 to 2,500 degrees. that's going to ensure complete combustion, and that way, there, the emissions that come out of it will be minimal to begin with. so you burn it. you're burning trash here? absolutely, yeah. but doesn't that release nasty toxic stuff into the air?
uh, no. the specific design of our boilers prevents that. the technology is new but the prinicple is as old as a 19th century locomotive. and the process is quite simple. trucks unload household garbage; giant cranes toss it, ten tons at a time, like a giant mixed salad, ensuring that an even mixture is combusted in the 2,000 degree furnace. take a peek inside. you can see the
whole process happening, right in front of your eyes. oh, my god! it's the gates of hell, fueled by pizza boxes. the heat rises, boils water in a network of thousands of tubes, and creates steam that turns a turbine that generates electricity. and this is the real payoff, right? absolutely. this is our clean, green energy going right off of the grid. electricity that you are selling back to the electric company? correct.
the electricity is cleaner than coal-burning plants. there are already over 400 of these waste-to-energy plants in europe and about 100 in the united states. and just this one, here, in peekskill, new york, burns enough trash to fuel the electricity needs of 88,000 homes. eighty-eight-thousand homes are being fueled by their own trash? absolutely. but even if we burned all our trash, we still wouldn't generate all the electricity we need.
and one of the biggest problems with our grid is that we have to keep fueling power plants, even when we're not using the energy, so a lot of electricity goes to waste. but what if we could store that electricity in really big batteries? and what if we could make those giant batteries dirt cheap? and the only way i know how to make something dirt cheap is to make it from dirt. and so that's the approach i'm taking with my group. make it from dirt? make it from dirt, from american dirt.
the dirt don sadoway has in mind is aluminum, the most abundant metal in the earth's crust. he's rethinking the old-fashioned aluminum smelter, the giant boilng cauldron used to extract molten metal from rocks. ...aluminum smelter is just, basically, a large bath and two electrodes. the aluminum smelter is already two-thirds of the way to being a regular battery. one electrode is the molten aluminum at the bottom, sitting in an electrolyte bath of salt. as the second electrode,
sadoway adds a lighter molten metal that floats on the top and has just the right chemistry to react with the aluminum and the salt. three layers of cheap molten minerals forming an electric battery. just charge it up with the unused electricity we already generate during hours of low demand and sadoway's battery will store that energy until it's needed. there are estimates that we can increase the effective generating capacity of this country by 15% without building one power plant. giant batteries could also solve one of the
biggest problems with sun and wind energy: what to do when the wind don't blow and the sun don't shine. a giant aluminum battery could store the sun and wind power and deliver it to the grid when we need it. but the power plant and grid model is actually an incredibly wasteful way to supply electricity. nobody wants a giant power plant or smelter in the backyard, so they have to be located far away. and by the time the power travels over wires to the
cool gadgets in our homes, nearly half of it is wasted. and a third of the people on the planet don't even have access to electricity because they're nowhere near a grid. so, imagine if all the people in the world could get clean electrical power without a grid. that's what one scientist, k.r. sridhar, is trying to achieve. he calls his invention a battery with a twist, but officially it's called a bloom box. it works on the same principle as a battery,
but it's made with different stuff. so this is the electrolyte. this is the "acid" in your battery. yeah, i'd much rather have this sitting near my children. i'd rather have this. i can't do this with a, i can't do this with lead acid, you know, sulfuric acid. you, you can. you would just be dead, yeah? right, exactly. as in a battery, the electricity is created by a chemical reaction.
but, as in a fuel cell, that reaction is created by two gases flowing in from the outside, in this case, natural gas and oxygen on opposite sides of the card. the reaction pulls electrons from the oxygen atoms, which generates an electric current. and how much electricity can this puny little playing card generate? today it produces 25 watts, enough for a big bright light in your house. this, this one thing? this one thing.
well..... bloom energy piles these small fuel cells into stacks, which will have a big effect. just two stacks are enough to power an average american house. they'd fill a box about the size of a window air conditioner. bloom boxes the size of a parking space are already producing enough electricity to power offices and factories of some big fortune 50 companies like fedex, ebay and google. it is generating enough juice for about a 20,000-square-foot office building.
that's like, a whole office building? whole office building. or a small factory, right? or, or a small supermarket. small supermarket. or four starbucks. four starbucks or one of my house. right. i'm kind of a gadget freak. electricity from the bloom box costs 40% less than power from fossil fuel power plants, with only one-third the pollution. for now, the bloom box still has to be hooked up to a natural gas line. but k.r. has plans to tap into a source of unlimited power
that comes with no strings attached: the sun. and chief materials scientist, mother nature, has already invented a way to harness that power: my plant. she converts sunlight into energy, which she stores as sugar in her cells. that's photosynthesis. we tap into that energy by burning or eating plants. [quielty] not you. but what if we could imitate that process by make like a leaf?
that's what nate lewis is doing. he's got a major grant from the united states department of energy to convert sunlight into chemical fuel. it's what he calls artificial photosynthesis, and he claims he can do it better than my plant. we have systems already in the lab that do show that we can capture, convert and store the sun's energy into chemical fuel, more than ten times more efficiently than the best plant on our planet. the power of the sun is no secret.
more energy from the sun hits the earth in one hour than all the energy consumed on our planet in an entire year. we already have solar panels that convert sunlight to electricity, but they're fragile and expensive, because the silicon they're made of has to be very pure. but nate's got a cheaper, more durable way to make solar cells, modeled on the leaves of the aspen tree. his silicon is shaped like veins of a leaf, embedded in a conductive plastic film.
the shape allows electrons to flow through the veins, even if the silicon has impurities. and nate's silicon leaves are cheap to grow and flexible enough to be rolled out like a solar blanket. all right, so this is the big moment. as i understand it, that is nate's magic microwire: rollable, cheap, solar panel material. so this is making electricity just like the panels would make on your roof. there's no current when there's not much light,
and then it sees the nice california sun, then we get more current. now here's the artificial photosynthesis piece of the puzzle. the energy storage. the best way to store energy is in chemical bonds. that's what nature does in photosynthesis. that's why we call this artificial photosynthesis. nate puts his silicon leaves into regular old water. the electric charge generated by these tiny solar panels
splits the h20 into its component parts, hydrogen and oxygen. you can see, if you just flip the switch, and then we will see the bubbles coming off of that as it does that chemical process. so, be my guest. i'm going to turn on the sun? turn on the sun. this always happens, people say, "here comes david pogue. it's like the sun coming out." whoa!
so, those are bubbles of....? hydrogen gas. by converting sunlight into storable energy, nate has figured out how to imitate what plants have been doing for billions of years: photosynthesis. if this scales up, the hydrogen produced could be useful in fuel cells to power our cars, homes and factories. and now, my plant is happy and so am i. she takes my carbon dioxide and uses it to grow, giving me oxygen in return,
and scientists are learning to make energy and materials in the same sustainable way, inspired by the perfect circle of life, bringing us closer, step-by-step to the ultimate dream of making stuff cleaner. the exploration continues on nova's website where you can watch any part of this program again. investigate clean energy technologies, from algae fuels to a smart electric grid.
and find out about futureistic proposals to capture c02 from the atmosphere. dig deeper into technology and engineering. with expert interviews, interactives, teacher resources and more. follow nova on facebook and twitter and find us online at: how can stuff be smart? can materials have a mind of their own? this is like x-men stuff.
oh, it's got me! host david pogue is on a quest to find out. tell my kids i love them. if we imitate nature, could we make materials that repel germs like shark skin does? can we fly like a bird or even scale buildings? could i not make a gecko costume that would let me climb walls? making stuff - smarter. next time on nova.
major funding for nova is provided by: and the corporation for public broadcasting and viewers like you, thank you. major funding for making stuff is provided by the national science foundation where discoveries begin. additional funding is provided by the u.s. department of energy office of science. and by american elements.
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