Question

when is a source of energy said to de a non renable source of energy give two example of such source

Answer 1

when the energy is obtained from conventional resources such as coal, petroleum etc. it is said to be non renewable resources of energy as we cannot renew it or create it

Answer 2

a source of energy is said to be a non renewable source of energy when the resource gets exhausted easily and is tough to replenish it. eg:-coal ,petroleum