Renewable resources have been discovered in the recent past and their use is yet to gain popularity. Non-conventional sources of energy are also known as renewable or alternative sources of energy. Renewable resources are known as the energy resources of the future.
The important renewable resources include wind energy, solar energy, geothermal energy, tidal energy, and biogas.
Solar energy: This is the energy derived from the sun. The use of solar energy is slowly gaining popularity in India. Solar energy products such as solar lamps and solar water heaters are now being increasingly used. It is an environmentally friendly and clean source of energy.
Wind energy: This is the energy derived from moving air or wind. Rural wind energy farms have been making use of this energy for many years. In recent years, wind energy has gained immense popularity worldwide. Efforts are being made to make wind power generators more efficient and practical.
Bioenergy: This is the energy derived from living organisms and organic matter. It comprises biogas and biomass energy. Biogas is obtained from gobar gas produced from cow dung. Biogas is an important source of energy and is used as cooking fuel. Biomass is obtained from plants. An advantage of using biomass is that it encourages afforestation.
Geothermal energy: In the word “geothermal”, geo means “earth” and thermal means “heat”. So, this is the energy derived from the heat present inside the earth.
Tidal energy: This is the energy derived from tides (i.e. the periodic rise and fall of the sea level under the gravitational pull of the moon).
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