Renewable energy sources, unlike non-renewable ones, are forms of renewable energy arising from the natural world, which do not pollute and do not run out. They are establishing themselves as alternative, clean and cheap energy.
Green energy sources, by definition, are those sources which do not run out. Some renewable energies can be regenerated faster than others, in favor of greater environmental sustainability.
The environmental impact of the so-called “clean” renewable resources is certainly lower than that of non-renewable and polluting energy sources, which can be grouped together with fossil fuels (coal, natural gas, crude oil) and nuclear fuels (uranium).
Main sources of green energy
Traditional energy resources are running out, while green energies are available to everyone:
It is used by photovoltaic systems that exploit solar radiation and allow the production of electricity, thanks to the help of solar panels equipped with a tank for the storage of water.
On an economic level, this type of energy guarantees savings on the electricity bill. To encourage the purchase of these systems, tax breaks and risk-free investments are provided.
Thanks to the power of the wind it is possible to generate mechanical and electrical energy. The mechanical energy is obtained by the windmills used for grinding wheat and other agricultural products.
Electrical energy, instead, is produced by wind power plants, which usually are located in the plains, where the wind is constant. Mini wind turbines are a good solution for individuals and companies, easy to install and beneficial both for economic savings and for the environmental impact.
It is obtained from the earth’s subsoil and transforms the refrigerant fluid into gas. Classical geothermal energy exploits geological and volcanological anomalies, while the one at low temperature exploits the subsoil.
It is mainly used for powering heating systems and air conditioners. It is relatively clean, always available throughout the day and has large average life span.
Waste from agricultural and industrial products produces low-cost electricity with minimal environmental impact.
The quantities of polluting materials produced are significantly lower than those emanating from fossil fuels.
The use of biomass involves also the chemical transformation of the organic material into biogas (methane), the combustion of timber or vegetable oils and the production of products for agriculture.
The sun heats the water, this evaporates and falls on the earth’s surface in the form of rain or snow, generating a movement of the water masses which in turn generates kinetic energy.
The most exploited hydroelectric plants are the basin and storage or reservoir ones. There are also new types of plants that provide water supplies from canals and pipelines, exploiting the energy produced for remediation channel systems and condenser cooling circuits.
It is generated by ocean currents and huge masses of water. Its conversion into electricity takes place thanks to the power generators.
This energy also has the advantage of being renewable and low-impact on the environment.
The disadvantages are related to the need to find suitable areas for the arrangement of the plants and the high construction and management costs.