One of the greatest problems that the world is facing today is that of environmental pollution, increasing with every passing year and causing grave and irreparable damage to the earth.
Air pollution is by far the most harmful form of pollution. It is caused by the injurious smoke emitted from cars, buses, trucks, trains, and factories, namely sulphur dioxide, carbon monoxide and nitrogen oxides. Even the smoke from burning leaves and cigarettes is harmful to the environment, causing a lot of damage to man and the atmosphere.  Evidence of increasing air pollution is seen in lung cancer, asthma, allergies, and several other breathing problems along with severe and irreparable damage to flora and fauna. Even the most natural phenomenon of migratory birds has been hampered due to severe air pollution, preventing them from reaching their seasonal metropolitan destinations of centuries.
FAIZAN KHAN,
Karachi, May 10.