We need different energy sources to live and work. 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 heat. They can also emit greenhouse gases when they are burned to generate electricity. This creates a need for more green energy sources.
The most popular type of energy is the fossil fuels, made up of coal oil, 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. Under the right conditions they were gradually transformed into carbon-rich compounds which, when burned produce energy. The fossil fuels cannot be renewable, as they’ll end up being depleted in our lifetimes or in a number of lifetimes.
Renewable energy sources are constantly replenished. The sun is the most important source of renewable energy, because it is a source of warmth and light. We use it for our homes as well as for businesses and automobiles. Wind is renewable energy source that generates electricity by spinning turbines. We have used it since humans first began to harness the wind for millennia. We use biological processes create ethanol (a clear, alcohol-like substance that can be used for fuel) from waste and crops.
As a result hydropower is the biggest renewable energy source in the United States, though wind and biofuels are expected be the next to take over. Hydropower relies on nature’s cyclic water cycle to harness the power of swiftly flowing water, which is then used in turn to produce electricity.