Can 100% renewable energy power How batteries work - Adam Jacobson 3 months ago   05:55

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Every year, the world uses 35 billion barrels of oil. This massive scale of fossil fuel dependence pollutes the earth, and it won’t last forever. On the other hand, we have abundant sun, water and wind, which are all renewable energy sources. So why don’t we exchange our fossil fuel dependence for an existence based only on renewables? Federico Rosei and Renzo Rosei describe the challenges.

Lesson by Federico Rosei and Renzo Rosei, directed by Giulia Martinelli.

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Comments 1041 Comments

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Abundant sun and wind? Think again, these sources are totally variable.
Oh i didnt know oil rigs were cheap and renewable sources were expensive
O nacionalismo vive!
Eu já vi muitos videos e percebi que esse canal e meio globalista
Steve Nikitas
The world has an infinite supply of coal, oil, natural gas and uranium. Don't believe the scare stories. The greenies said in the 1970s that we would run out of oil by 1990. Yet we have more oil reserves than ever, and it is becoming easier and easier to find.
Future Environmental Engineer
jieqiang luo
How about we take advantage of global warming for hydroelectric.
Raptor D.O
Current green technology is worse than fossil fuels.
The answer is not as complicated as you make it sound leave out the politics ONE AND TWO we have the technology already we just have to put it together in the right format
IIJohn David
what happens if you used energy on money printing and then you the money to buy more solar panels so that we get more and more energy until we've made a Dyson Sphere
JK Clean energy man
I have some clean energy ideas that are not wind, solar or hydro.  And I even have some ideas how to pay for the research and development myself.  Anyone want to hear more, let me know.   Have the best day of your life every day.
Enrique Herrera
Shouldn’t we consider nuclear fusion as a renewable energy as well? You only need a ridiculous amount of Lithium to make it happen if we develop that technology as well
Let the actual demand take control of what we use, not politics. When the government gets involved, things fail hard.

We should look at better nuclear technologies for power, such as thorium reactors and molten salt reactors.
Cristina Oliva
Great TED-ed! I want to be a contributor to help climate change, It's a good way to invest in low cost in renewables, so I already applied to get a discount:

Has somebody know about this product? Some references?
Thank you
Vincent Robinette
For vehicles, even aircraft, the storage density of batteries only needs to be about 40 percent of the energy density of oil. That's because of the dismal efficiency of combustion engines of any kind, compared to electric motors. Engines are only about 25% efficient, Electric motors can exceed 80%, even including the electronic controller. Of the 36 kilowatt hours available in a gallon of gas, you're lucky to get even 12 kilowatts hours, measured at the flywheel. That makes it seem like a more achievable goal.
Somnath Pal
For the production of components of windmill, solar panels; we use furnaces which uses coal. I think at the end, we will not be able to cut off our reliance on coal, even if we produce enough from renewable energy. Also,increase in production of such components will result in increase in emissions. I think the pollution factor will be the same at the end unless a solution is found to decrease our reliance on fossil fuels
Jarod Farrant
I’m addicted to ted-Ed who’s with me?
Reuben Gibson
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How batteries work - Adam Jacobson Can 100% renewable energy power 3 months ago   04:20

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Batteries are a triumph of science—they allow smartphones and other technologies to exist without anchoring us to an infernal tangle of power cables. Yet even the best batteries will diminish daily, slowly losing capacity until they finally die. Why does this happen, and how do our batteries even store so much charge in the first place? Adam Jacobson gives the basics on batteries.

Lesson by Adam Jacobson, animation by FOX Animation Domination High-Def.

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