Name the organisms which do not derive energy directly/indirectly from sun.

Name the organisms which do not derive energy directly or indirectly from sun

Name one source of energy which is not derived directly or indirectly from solar energy.

All life on earth derive its energy directly or indirectly from sun except

All life on earth derive its energy directly or indirectly from sun except

All life on earth derive its energy directly or indirectly from sun except

Name one source of energy which is not derived from solar energy directly or indirectly.

Name some organisms which fix atmospheric nitrogen directly.

Name the alkali metals which do not combine directly with nitrogen.

A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.