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What is renewable energy?

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Quick answer

Renewable energy comes from natural sources that replenish faster than we use them — sunlight, wind, water, and heat from the Earth. Unlike fossil fuels, it doesn't run out and produces little or no carbon. Sources: solar, wind, hydro, geothermal, and biomass.

Key things to understand

  1. Sources: solar, wind, hydro, geothermal, and biomass.
  2. They naturally replenish, so they won't run out.
  3. They emit little to no greenhouse gas during operation.
  4. Main challenges: intermittency (sun/wind vary) and storage.

People also ask

What are examples of renewable energy?
Solar, wind, hydroelectric, geothermal, and biomass.
Why is renewable energy important?
It cuts carbon emissions and won't run out, unlike finite fossil fuels.
What is the main challenge of renewables?
Many sources are intermittent (the sun sets, wind drops), so storing and balancing supply is key.

Part of the guide: Energy & Electricity at Home →