Question

Match the items given in column I with those in column II and select the correct options given below:

Column I	Column II
(A)Eutrophication	(i)UV – B radiations
(B)Sanitary landfill	(ii)deforestation
(C)snow blindness	(iii)Nutrient enrichment
(D)Jhum cultivation	(iv)waste disposal

a. A – 3, B – 4, C – 1, D – 2
b. A – 2, B – 1, C -3, D – 4
c. A – 1, B – 2, C – 4, D – 3
d. A – 1, B – 3, C – 4, D – 4

Answer 1

Hint: The accumulation of harmful substances in water bodies can benefit certain microorganisms such as algae and increase their growth. The waste disposal involves various methods such as recycling, dumping, etc. Direct exposure to the U.V radiation can harm the eyes.

Complete answer:
The pollution of water, land and air is increasing day by day. It should be controlled to protect the earth. Various preventive measures should be taken to conserve the natural resources for future generation.
Nutrient enrichment of the water bodies can be due to the flow of the fertilizers in it. It causes the growth of algae and results in eutrophication.
The one of the methods of waste disposal is sanitary landfills. The land filling is done to ensure that the wastes do not interact with the environment. It is an isolated area for conservation.
UV- B radiation acts as an important factor in the induction of cataracts which causes permanent damage to the cornea and causes snow blindness.
The practice of cultivation that involves clearing of the land of trees and vegetation is known as jhum cultivation. The nutrient content of the soil increases by the burnt soil as it contains potash.

Thus, the correct answer is option a that is A – 3, B – 4, C – 1, D – 2.

Note:
The air pollution is increasing very rapidly that it causes global warming and due to which ozone depletion occurs. Due to ozone depletion the UV radiation directly reaches the earth surface. They are very harmful for our skin and health. Accumulation of harmful substances in water bodies can be very dangerous for aquatic life. It can also damage huge water bodies such as the sea and rivers.