Question

fossil fuels should be used judiciously .comment

Answer 1

Because they are in limited amount in nature and can be vanished very soon on overuse.

Also it take thousands of years for the formation of fossil fuels so we should use it judiciously. :)

Answer 2

(i) Coal/petroleum were formed from the degradation of biomass millions of years ago, so they will get exhausted.
(ii) When they are burnt, they cause pollution.
(iii) They are huge reservoirs of carbon and if all the carbon is converted to C$O_{2}$, it will lead to
global warming.