Environmental Issues

Answer (d) 5?6

Answer (d) Mercury

Answer (a) 70%

Answer (a) Ozone layer depletion

Bad ozone is formed in the lower atmosphere (troposphere) that harms plants and animals. Good ozone is found in the upper part of the atmosphere called the stratosphere, and it acts as a shield absorbing ultraviolet radiation from the sun. UV rays are highly injurious to living organisms since DNA and proteins of living organisms preferentially absorb UV rays, and its high energy breaks the chemical bonds within these molecules.

Electrostatic precipitators are used in industries to reduce particulate pollution from air.

Answer (d) World Environment Day

Chipko movement was first led under the leadership of Mr. Sunderlal Bahuguna. He presented a plan regarding ban on tree felling in Himalayas at the United Nations Environmental Programme (UNEP) meeting held in London in 1982.