Mention any two reasons for the failure to sustain underground water.

$A$ successful forest conservation strategy should involve

Among the statements given below,select the ones that correctly describe the concept of sustainable development:
$(i)$ Planned growth with minimum damage to the environment
$(ii)$ Growth irrespective of the extent of damage caused to the environment
$(iii)$ Stopping all developmental work to conserve the environment
$(iv)$ Growth that is acceptable to all the stakeholders

Local people around forests are referred to as "stakeholders" for the conservation of forests. Give reasons.

$(a)$ 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?

The three $R$'s that will help us to conserve natural resources for long-term use are: