(i) Name any two fossil fuels. Why are they so-called ?
(ii) Mention the role of forests in conserving the environment. How do the forest get depleted ?

Explanation

(i) Coal and Petroleum.
Formed from the degradation of biomass millions of years ago.
(ii) (a) Preservation of biodiversity.
(b) Provide forest products
Reasons for depletion :
(a) Indiscriminate falling of trees.
(b) Destroying biodiversity to produce one particular kind of trees.