We need different energy sources to work and live. Solar, wind, geothermal and biomass are some of the sources. These sources aren’t just a major source for electricity, but they can also be used to heat or transport. These energy sources emit greenhouse gases when they are burned to create electricity. This is why there is a need for more sustainable energy sources.

Fossil fuels are the most common form of energy. They include coal, oil and natural gas. They began to form millions and millions of years ago when animals and plants of the past died and were buried under layers of sedimentary rock. After that, under the right conditions, they slowly transformed into carbon-rich substances that, when ignited create energy. These fossil fuels won’t be renewable because they will become depleted by the time we reach our age or in a variety of lives.

Renewable energy sources are continuously replenished. The most important renewable energy source is sunlight, which produces warmth and light. It is used to power our homes and businesses as well as to drive vehicles. Wind is a different renewable energy source that generates electricity through spinning turbines. Since the first time people realized how to harness the wind, we have been using it for millennia. We employ biological processes to create alcohol (a clear, alcohol-like substance primi 3 punti chiave di unesperienza centralizzata that can be used for fuel) from waste and crops.

Hydropower is the most important renewable energy source in the US, but biofuels and wind are likely to overtake it. Hydropower is a natural cycle to harness water’s rapid flow, which is used to produce electricity.