Final answer:
Four examples of non-fossil fuels are solar energy, wind energy, hydroelectric power, and biomass.
Step-by-step explanation:
Examples of non-fossil fuels include energy sources that are not derived from fossilized organic matter. Four such sources are:
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- Solar energy - derived from the sun's light, solar panels convert sunlight into electricity.
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- Wind energy - harnessed by wind turbines, kinetic energy from wind is converted into electrical energy.
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- Hydroelectric power - produced by the movement of water through turbines in dams, transforming kinetic energy into electricity.
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- Biomass - organic materials like wood, crop waste, and manure can be burned or converted into biofuels such as biodiesel or ethanol.
Unlike fossil fuels, which include coal, oil (petroleum), and natural gas, these non-fossil fuel sources are considered to be renewable because they can be replenished on a human time scale. Moreover, they are essential components in reducing greenhouse gas emissions and combating climate change.