$A$ loss of diversity may lead to a loss of ecological stability.

Which plant leaves are used to make $Bidis$?

Which of the following is not a natural resource?

Destruction of forests has little or no effect on the quality of soil and the source of water.

$(a)$ 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?

Select the eco-friendly activity among the following.