We require a variety of energy sources to work and live. They include wind, solar geothermal, biomass, and geothermal sources. In addition to being the primary 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 creates the need for renewable energy sources that are more sustainable.
Fossil fuels are the most common form of energy. They comprise oil, coal and natural gas. They were formed millions of years ago when prehistoric animals and plants died and were buried under layers of sedimentary rocks. In the right conditions they were gradually transformed into carbon-rich substances which, when burned, produce energy. These fossil fuels are non-renewable because they will run out in our lifetimes, or in many lives.
Renewable energy sources are, however are continuously replenished. The primary renewable energy source is sunlight, which supplies light and heat. It is used to power our homes and businesses as well to drive our cars. Wind is another renewable energy source, which generates electricity through spinning turbines. Since the first time people realized how to harness wind and harness it, we have been using it for millennia. We use biological processes to produce the ethanol (a alcohol-like substance that is clear and transparent which can be used as fuel) from waste and crops.
Hydropower is the largest renewable energy source in the United States, but wind and biofuels will soon overtake it. Hydropower draws on nature’s hydro continue reading this cycle to harness the power of flowing water, which is then used in turn to generate electricity.