Answer:
Humans transfer and transform energy from the environment into forms useful for humanendeavors. Currently, the primary sources of energy used by humans include fuels, like coal, oil, natural gas, uranium, and biomass.
Because energy sources make our lives much easier. Solar energy helps us warm our houses and cook our food, wind energy helps run windmills for our electricity, and gasoline helps fuel our cars! Overall it is a much easier and more efficent lifestyle then making fires, and walking to places far away.
