Question
Biology Question on Environmental Issues
Which of the following is the main factor of desertification?
A
over-grazing
B
tourism
C
irrigated agriculture
D
all of these.
Answer
over-grazing
Explanation
Solution
Desertification means a process of spread of desert that occurs due to degradation of environment, cutting of trees, soil erosion etc. It can be natural or man made. The main causes for desertification are overcultivation of poor soils, over grazing by animals, excessive cutting of fuelwood and inappropriate irrigation practises resulting in salinization. Among them overgrazing is the most important factor as it causes maximum effect.