摘要: |
Mankind is familiar with air pollution occurring due to forest fires, ash from volcanic eruptions and fine dust in arid conditions which were all caused by natural phenomena. During the industrial revolution, air pollution due to belching of smoke from chimneys of industries was 'accepted' initially until the soot became a menace in townships. However, nature was 'self-healing' till the early 20th Century due to abundant forest cover and slow population growth. The world population has quadrupled from about two billion in the year 1900 to about eight billion today with India alone accounting to 1.4 billion people. Moreover, due to availability of health care, higher education, employment opportunities and better wages led to migration of people to towns and Cities. Today 34% of India's population lives in urban areas and the migration of people from rural areas is continuing. |