We need different energy sources to work and live. Geothermal, solar, wind and biomass are just a few of the sources. These sources are not just an important source of electricity, but they can also be used for heating and transport. The main challenge with these energy sources is that they could cause greenhouse gas emissions when they are burned to generate electricity. This results in the need for more sustainable energy sources.

Fossil fuels are the most well-known form of energy. They include oil, coal and natural gas. They began to form millions of years ago when prehistoric animals and plants died and were buried under layers of sedimentary rock. If the conditions were right the fossil fuels gradually transformed into carbon-rich compounds which, when ignited create energy. They are not renewable because they will run out in our lifetimes or even in many lifetimes.

Renewable energy sources are, however are constantly replenished. The sun is the most important source of renewable energy, as it provides both light and heat. We use it to power our homes vehicles, businesses, and homes. Wind is renewable energy source that produces electricity by spinning turbines. We have been using it since we first began to harness the wind for millennia. In addition, we employ biochemical processes to create ethanol (a clear alcohol that can be used to fuel) from waste and crops.

Of all these sources, hydropower is the largest renewable energy source in the https://leonardogiombini.it/2018/10/19/i-vantaggi-delle-centrali-energetiche United States, though wind and biofuels are expected be the next to take over. Hydropower is based on nature’s water cycle to harness the power of fast-flowing water, which is used for electricity generation.