We require different sources of energy to work and live. Solar, wind, geothermal and biomass are some of the sources. These sources aren’t only major sources of electricity, but also can be used for heating and transport. The main issue for these energy sources is that they can cause greenhouse gas emissions if they are burned to generate electricity. This is why there is a need for more sustainable energy sources.
The most common kind of energy is fossil fuels, which consist of coal oil, natural gas. They were created thousands of years ago, when prehistoric animals and plants died and were then buried under layers of sedimentary rocks. In the right conditions these fossil fuels gradually transformed into carbon-rich substances that, when burned, produce energy. They are not renewable as they will run out within our lifetimes or in a number of lifetimes.
Renewable energy sources are continuously replenished. The sun is the main source of renewable energy, as it provides both heat and light. It is used to power our homes and businesses as well to drive cars. Wind is an energy source that is renewable and produces electricity by spinning turbines. We have used it since humans first began to harness the wind for millennia. We employ biological processes to produce alcohol (a alcohol-like substance that is clear and transparent which can be used as fuel) from crops and waste.
Hydropower is the most important renewable energy source in America, however biofuels and winds will soon overtake it. Hydropower uses the natural water cycle to harness water’s rapid flow, which is used to generate electricity.
Comentários