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How powerful is the world's biggest battery?

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As of 2020, the world’s biggest lithium-ion battery is hooked up to the Southern California power grid and can provide enough power for about 250,000 homes. But it's actually not the biggest battery in the world: a pair of lakes are. How can lakes be a battery? Explore how inventors are rethinking what a battery can be, and how these surprising solutions could help us achieve a sustainable future.

Explain how the lakes mentioned in the video store and release energy.

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Watch the video and finish the Think section to complete the lesson.

About Plan for Zero

Climate change is one of the biggest challenges we face today, and the stakes could not be higher. To avoid the worst effects of a warming world - which will be catastrophic - humans need to stop adding greenhouse gases to the atmosphere. TED-Ed created a video series which provides a plan to meet those goals, based on an urgent, authoritative book by Bill Gates, How to Avoid a Climate Disaster. Avoiding a climate disaster won’t be easy, but it’s possible. Learn more »

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  • Video created by TED-Ed
  • Lesson Plan created by TED Ed

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