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Chapter- 18 Pollution of Air and Water (Class-2) (8/10/21), , 1. What are the effects of Air pollution?, , Ans: Long-term health effects from air pollution include heart disease, lung cancer,, and respiratory diseases such as emphysema. Air pollution can also cause longterm damage to people's nerves, brain, kidneys, liver, and other organs. Some, scientists suspect air pollutants cause birth defects., , 2. What is Ozone depletion?, , Ans: Ozone depletion, gradual thinning of Earth's ozone layer in the upper, atmosphere caused by the release of chemical compounds containing gaseous, chlorine or bromine from industry and other human activities. The thinning is most, pronounced in the polar regions, especially over Antarctica., , 3. Effects of Ozone depletion?, , Ans: Ozone layer depletion causes increased UV radiation levels at the Earth's, surface, which is damaging to human health. Negative effects include increases in, certain types of skin cancers, eye cataracts and immune deficiency disorders., , 4. What are Air pollutants?, , Ans: Air pollutants are airborne substances (either solids, liquids, or gases) that, occur in concentrations high enough to threaten the health of people and animals,, to harm vegetation and structures, or to toxify a given environment.