We require different sources of energy to live and work. Geothermal, solar, wind and biomass are among the sources. These sources are not just a major source for electricity, but can also be used for heating and transport. They can also emit greenhouse gases when they are burned to produce electricity. This leads to the need for renewable energy sources that are more sustainable.
The most widely used type of energy is the fossil fuels, comprised of coal oil, natural gas. They were created millions of years ago when prehistoric animals and plants passed away and were buried under layers of sedimentary rocks. When the conditions were right, these fossil fuels were gradually transformed into carbon-rich compounds which, when ignited produce energy. These fossil fuels are non-renewable because they will run out in our lifetimes, or in many lifetimes.
Renewable energy sources are, however are continuously replenished. The primary renewable energy source is sunlight, which gives heat and light. We use it to power our homes vehicles, businesses, and homes. Wind is a different renewable energy source, which generates electricity by spinning turbines. We have used it since humans first began to harness the wind for millennia. In the end, we employ biological processes to produce ethanol (a clear alcohol that can be used as a fuel) from waste and crop residues.
Hydropower is the largest renewable energy source in America, however biofuels and wind are likely to take over. Hydropower relies on nature’s water cycle to harness the power of rapid-flowing water, which is then used in turn to produce electricity.
