Different energy sources provide us with the energy we require to live and work. These include wind, solar, geothermal, and biomass sources. In addition to being the primary source of electricity, these sources are also used for transport and heating. The main issue for these energy sources is that they may cause greenhouse gas emissions if they are burned to generate electricity. This leads to the need for greener sources of energy.
The most commonly used type of energy is the fossil fuels, comprised of coal oil, natural gas. They began to form millions and millions of years ago when prehistoric animals and plants died and were buried by layers of sedimentary rock. Then, under the right conditions, they slowly transformed into carbon-rich substances that, when burned create energy. These fossil fuels are not renewable since they will be exhausted in our lifetimes, or in many lifetimes.
Renewable energy sources however are continuously replenished. The sun is the most important source of renewable energy, because it is a source of light and heat. We utilize it for our homes as well as for businesses and automobiles. Wind is a different renewable energy source, which generates electricity through spinning turbines. Since the first time people realized how to harness wind, we have been using it for millennia. We use biological processes create an ethanol (a clear, alcohol-like substance that can be used as fuel) from the waste of crops and other materials.
Hydropower is by far the most important renewable energy source in America, however biofuels and wind will soon surpass it. Hydropower relies on nature’s water cycle to harness the power of fast-flowing water, which is used in turn to generate electricity.
https://leonardogiombini.it/2018/11/17/dal-protocollo-di-kyoto-e-oltre