Why renewable energy sources are so important and most importantly, what are they? These energy sources are fundamentally the varieties of motion we as human beings or the Earth are able to replenish. They extract energy from the ecosystem and deliver it to human beings in usable forms. They are very different from the chief sources of energy that we use in the recent times like fossil fuels. However, these energy sources so not represent the economically dream of the future. They are a trend now and almost all the countries of the world are bent towards generating a minimum of ten percent of energy from the renewable sources of energy.
Sun is the source of everything living on this Earth. It is the quantity of energy that is produced by the sun, which means that solar power has the capability of being the biggest source of renewable energy. However, the big challenge is developing products capable of turning solar energy into power. In the recent years, some big leaps have taken place in this category. Solar panels can now be installed easily in residential and commercial complexes.
An immeasurable quantity of heat is also circulated from the crust of the earth because the earth’s core tends to be super hot around 70000 C. Under the earth’s crust lie enormous quantities of hot water. This water is easily pumped up onto the ground, producing energy that is trapped in the form of geothermal energy. This actually takes place in areas where the crust of the earth is very thin. Even individual homes trap this energy and use it for the purpose of cooling and heating.
Wind power generators or turbines are another unlimited source of renewable energy and they have been used since decades. Wind is one of the simplest methods of generating power from renewable source, but it needs a good amount of land for the installation of the turbines. It is the limited acquisition of land that has limited the use of wind energy. However, researches are taking place to develop wind turbines offshore.
Ocean energy includes tidal energy and wave energy. Both these forms of ocean energy turn water movement into power. The markers of wave energy make use of the up and down movement of the waves for compressing air in and out of a tube which then helps in powering a turbine. Tidal energy makes use of large barrages that trap water as it flows and ebbs and is then passed over turbines for generating power.
Biomass energy means exploiting energy present in a living thing, particularly plant material like rapeseed. The product is grown initially and then it is burnt for the generation of electricity. Alternatively, it can also be used directly in the form of fuel for motor vehicles. These are some of the well-known renewable energy sources and researches are still being carried out to find some more of them.