question_answer

  Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices. [NCERT]         

Answer:

                  (i) Fossil fuels            (ii) Nuclear fuels Fossil fuels are present in a limited amount in the Earth. Once exhausted, they will not be available to us again. It takes millions of years for fossil fuels to be formed. The nuclear materials which can be conveniently extracted from the Earth are limited and hence, they will get exhausted one day.