Experts answer the 8th one!!!(subhashish me 4:30 )

Ans: 8.  Energy is the  primary requirement for economic development. Conventional sources of energy like petroleum, coal, firewood, natural gas have long been in use.   Both agricultural sector or industrial sector depend on  energy sources to remain operational and to ensure production. With the increase in population, rising demands, greater industrialisation, increased consumption, changes in transportation  requirements  for energy resources will increase.  Hence, it has become necessary to use  non conventional sources of energy like solar energy, wind energy, geothermal  energy etc.

Moreover, our  energy resources are limited and we have to conserve them. This can be done by using more and more non conventional sources of energy. We can for example make use of solar heater, cookers, use biogas for cooking and lighting. In this way we can save energy.

Regards