What to use?
We hear many times that we should try our best to reduce pollution, but what can we really do?
The answer is not simple but not yet complex.
The idea is of using non-conventional sources of energy like solar, wind, geothermal, etc.
1. Solar Energy- The unlimited energy is freely available on earth. Specially in tropical zones, It can be tapped easily. Solar cookers, Solar lanterns, solar heaters, solar street lights, etc. are used widely now a days. Many developed countries and developing countries like India have taken initiative to promote it. Solar cells convert solar energy into electric energy.
2. Wind Energy- Areas having high wind velocity can be used to generate wind energy. Coastal areas and grasslands are good for it. It is used for grinding grains, pumping water and even in electricity generation. Wind power harnesses the power of the wind to propel the blades of wind turbines. These turbines cause the rotation of magnets, which creates electricity.
3. Geothermal- The heat underneath the earth geothermal energy. It is more prominent in volcanically active areas. A low boiling point liquid is used to drive a turbine and generator in a closed system similar to a refrigeration unit running in reverse.
4. Tidal power can be extracted from tides by locating a water turbine in a tidal current, or by building impoundment pond dams that admit-or-release water through a turbine. The turbine can turn an electrical generator, or a gas compressor , that can then store energy until needed. Coastal tides are a source of clean, free, renewable, and sustainable energy.
§ Nuclear Energy- Nuclear energy as harnessed from the reaction of radioactive elements. Nuclear energy is produced in two different ways, in one, large nuclei are split to release energy. In the other method, small nuclei are combined to release energy.
Nuclear Fission- In nuclear fission, the nuclei of atoms are split, causing energy to be released.
Nuclear Fusion- In nuclear fusion, the nuclei of atoms are joined together, or fused. This happens only under very hot conditions.
Advantages
1. Non-conventional sources need investment once only.
2. These resources are environment friendly.
3. Fossil fuels are not wasted.
4. These resources are always available.
5. Easily available.
