Question

give reasons:
(i) petroleum is referred to as "black gold".
(ii) quarrying can become a major environmental concern.

Answer 1

Answer:

(i ) The Petroleum is called black gold because when the crude oil is extracted from the soil below, it is black in colour. Petroleum is very expensive like gold

But after the purification of black crude oil, it gives golden colour. So, this is another reason for its name.

( ii )Quarrying can become a major environmental concern because it destroys the flora and fauna around it. It destroys the humus of soil, which is required for the growth of plants and crops. It produces dust, which causes air pollution and also produces noise pollution