We require various energy sources to work and live. Solar, wind, geothermal and biomass are a few of the sources. In addition to being a major source of electricity they can also be used for transport and heating. These energy sources can emit greenhouse gases when burned to create electricity. This is why it is necessary to find renewable energy sources that are more sustainable.
Fossil fuels are the most well-known form of energy. They include oil, coal, and natural gas. They were created thousands of years ago, when prehistoric animals and plants died and were buried beneath description layers of sedimentary rocks. Under the right conditions the fossil fuels gradually transformed into carbon-rich substances that, when burned generate energy. These fossil fuels cannot be recycled since they will exhaust in our lifetimes or in many lives.
Renewable energy sources are replenished regularly. The primary renewable energy source is sunlight, which supplies heat and light. It is used to power our homes and businesses as well as to drive cars. Wind is an energy source renewable that generates electricity by spinning turbines. We have been using it since we first discovered how to harvest the wind for millennia. In addition, we employ biological processes to create an ethanol (a clear alcohol that can be used as fuel) from waste and crop residues.
Of all these sources hydropower is the biggest renewable energy source in the United States, though wind and biofuels are expected become the dominant source in the near future. Hydropower relies on nature’s cyclic water cycle to harness the power of fast-flowing water, which is then used to generate electricity.