We require a variety of energy sources to work and live. Geothermal, solar, wind and biomass are a few of the sources. In addition to being an important source of electricity, these sources can also be used for transport and heat. These energy sources emit greenhouse gases when burned to produce electricity. This is why it is necessary to find more sustainable energy sources.
Fossil fuels are the most popular form of energy. They include oil, coal and natural gas. They formed millions of years ago when prehistoric animals and plants died and were covered by layers of sedimentary rock. In the right conditions the fossil fuels gradually transformed into carbon-rich substances which, when burned generate energy. These fossil fuels won’t be renewable as they will be depleted in our lifetimes or in a number of lifetimes.
Renewable energy sources are, however are constantly replenished. The primary renewable energy source is sunlight, which gives heat and light. It is used to power our homes and businesses as well to drive cars. Wind is an energy source renewable that produces electricity through spinning turbines. We have been using it since people first discovered how to harvest the wind for millennia. We employ biological processes to produce ethanol (a alcohol-like substance that is clear and transparent that can be used to make fuel) from crops and waste.
Hydropower is by far the most important renewable energy source in America, but biofuels and wind will soon take over. Hydropower makes use of the natural water cycle to harness the power of water’s rapid flow, which in turn can be used to produce electricity.