We require a variety of energy sources to live and work. Geothermal, solar, wind and biomass are some of the sources. In addition to being a major source of electricity, these sources can also be used for transportation and heating. The main issue with these sources of energy is that they may cause greenhouse gas emissions when used to produce electricity. This leads to the need for more sustainable sources of energy.
The most common kind of energy is called fossil fuels, made up of coal, oil, and natural gas. They began to form millions of years ago when prehistoric animals and plants passed away and were then buried beneath layers of sedimentary rock. When the right conditions, they were gradually transformed into carbon-rich materials that, when ignited produce energy. These fossil fuels won’t be renewable as they will end up being depleted in our lifetimes or in a number of years.
Renewable energy sources are replenished regularly. The primary renewable energy source is sunlight, which provides light and heat. We use it to power our homes and businesses, as well as to drive cars. Wind is another renewable energy source, which generates electricity by spinning turbines. Since the first people discovered how to harness the wind we have been utilizing it for millennia. In addition, we employ biological processes to produce an ethanol (a clear alcohol that can be used to fuel) from waste and crops.
Hydropower is the largest renewable energy source in America, but wind and biofuels will soon overtake it. Hydropower relies on nature’s water cycle to harness the power of fast-flowing water, which is used in turn to produce electricity.