Describe harmful effects of air pollution.

ANS :


* Burning sensation in eyes, nose and throat.
* Diseases of lungs like bronchitis, asthma, etc. caused by pollutant gases like SO2 and NO2.
* Diseases of respiratory system spread through dust particles. Silicosis is caused by silica and asbestosis is caused by asbestos.
* Cancer caused by carcinogenic pollutants.
* Heavy metals inhaled through air cause poisonous effects.
* Increase in ultraviolet radiation reaching earth due to depletion of ozone layer causes skin cancer, damage to eyes and damage to immune system.
* Dissolution of atmospheric gases like SO2, SO3, NO2 in moisture results in formation of sulphuric acid and nitric acid. This causes acid rain which harms organisms, various monuments and buildings.
* Carbon dioxide and methane absorb heat and increase the temperature of earth's atmosphere. This is known as Greenhouse effect. This increase in temperature results in melting of ice on polar regions and causes sea level to rise.