Question

what will happen if coal and petroleum get exhausted

Answer 1

if all coal and petroleum get exhausted then ,hydrogen is used and also solar energy is used ,because it is future fuel .

Answer 2

If coal and petroleum get exhausted then we have to depend upon future fuels i.e solar energy , hydrogen , bio gas .will help us because are the energy will will never end like sun energy.

Hope it will help u..

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Best of luck ;)
ROYALJATT