From what is coal gas obtained?

Which of the following is a biological natural resource?

Water is a valuable resource. List two ways that you would suggest every family member to save this resource.

Who controls the resources of government-owned forests?

$(a)$ What is meant by fossil fuel?
$(b)$ Which fossil fuel is usually conserved when we save on electricity?
$(c)$ At the present rate of consumption,how long will the known reserves of coal and petroleum last?

Ground water will not be depleted due to