question_answer

                  

(a) Inspite of being called the Blue Planet, the Earth experiences shortage of water. Why?

(b) How are human beings disturbing the balance of nature?

Answer:

(a) The earth experiences water shortage because 97% of the earth's water is found in the oceans and is too salty for human use. Of the remaining 3%, large proportion is in the form of ice sheets, glaciers and under the ground. A very small percentage is available as fresh water.

(b) Human beings have certain needs and with these he also has certain abilities-physical as well as mental. Thus, in order to fulfil these needs, human beings continuously use his abilities to modify the nature. But with the advancement in technology, this modification of nature has taken the shape of degradation and exploitation of nature.