We require different sources of energy to live and work. Geothermal, solar, wind and biomass are among the sources. These sources are not only major sources of electricity, but also can be used to heat or transport. They can also emit greenhouse gases when they are burned to produce electricity. This results in the need for more interessante articolo sui biocarburanti environmentally sustainable energy sources.
Fossil fuels are the most well-known form of energy. They include 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. Then, under the right conditions, they were slowly transformed into carbon-rich substances that, when ignited create energy. These fossil fuels will not be renewable, as they’ll become depleted by the time we reach our age or in a number of years.
Renewable energy sources however, are continually replenished. The sun is the most important source of renewable energy because it is a source of warmth and light. We use it to power our homes and businesses and to drive vehicles. Wind is renewable energy source that produces electricity through spinning turbines. We have been using it since people first discovered how to harvest the wind for millennia. Finally, we use biological processes to make ethanol (a clear alcohol that can be used as a fuel) from waste and crops.
Hydropower is by far the most important renewable energy source in America, however biofuels and wind will soon overtake it. Hydropower draws on nature’s hydro cycle to harness the power of fast-flowing water, which is used in turn to generate electricity.