Deforestation is decrease of forest cover of an area. World forest cover of 7000 million hactares has been reduced 2400 million hectares in 2000. It is estimated that about 40% forests have been lost in the tropics compared to 1% loss in temperatre regions. In India, at the beginning of 20th century forest cover was about 30% of the total [...]
We depend on air for our respiratory needs. So, air pollution causes injury to all living organisms. In case of plants, the growth and yield of crops are reduced and cause premature death. In animals including man, serious metabolic and respiratory diseases are manifested due to air pollution. Air pollution is also called as atmospheric pollution. The atmosphere is an [...]
Increase in the level of green house gases has led to considerable heating effect on Earth, so that there has been constant rise in atmospheric temperature during past 4-5 decades. During the past antury the temperature of earth has increased by 0.6°C. According to IPPC (inter-government Panel on Climatic Change) average temperature of Earth would rise by 1.4°C to 5.8°C. [...]