Sustainable and renewable energy is a hot topic in many circles, and the California 4-H Youth Development Program is joining the movement. A source of energy is considered renewable if it is a natural resource and can be naturally replenished in a relatively short time. Producing electricity from renewable sources will not result in harmful pollutants or emissions and will not harm ecosystems. Renewable energy can be produced using sources like the wind, sunlight, hydrogen, geothermal energy (heat from inside the earth), biomass (energy from plants), flowing rivers, and even the power of the ocean. Renewable energy is also called "clean" or "green" power.
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