We need different energy sources to work and live. Geothermal, solar, wind and biomass are a few of the sources. These sources are not only major sources of electricity, but they can also be used to heat and transport. These energy sources emit greenhouse gases when burned to produce electricity. This leads to the need for more sustainable energy sources.
Fossil fuels are the most widely used type of energy. They comprise oil, coal and natural gas. They were formed thousands of years ago when prehistoric animals and plants passed away and were buried under layers of sedimentary rocks. In the right conditions they were slowly transformed into carbon-rich materials which, when burned produce energy. These fossil fuels will not be renewable because they will run dry in our lifetimes, or in many years.
Renewable energy sources are replenished regularly. The sun is the most important source of renewable energy since it supplies warmth and light. It is used to power our homes and businesses, as well as to drive cars. Wind is renewable energy source that produces electricity by spinning turbines. We have used it since humans first discovered how to harvest the wind for millennia. We utilize biological processes to create an ethanol (a alcohol-like substance that is clear and transparent that can be used for fuel) from waste and crops.
As a result, hydropower is the largest renewable energy source in the United States, though wind and biofuels are expected to be the next to take over. Hydropower relies on nature’s water cycle to harness the power of flowing water, which is then used in turn to produce electricity.
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