How to store renewable energy

Renewable-energy storage is important to help humanity reduce its dependence on fossil fuels such as oil and coal, which produce carbon dioxide and other greenhouse gases that cause climate change.

Harnessing the power of the sun with solar panels and utilizing wind power with wind turbines are two common ways to generate renewable energy. But the sun isn’t always shining and the wind isn’t always blowing when we want electricity, and sometimes they produce surplus energy when demand is low.

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