THANKS TO SHRI PC MOHAN SIR FOR AIR POLLUTION AWARENESS

The objective of National Ambient Air Quality Standards (NAAQS) is-

To indicate necessary air quality levels and appropriate margins required to ensure the protection of vegetation, health and property.
To provide assistance in the establishment of priorities for abatement and control of pollution.
To provide a uniform yardstick for assessment of air quality at the national level.
To indicate the extent and need of monitoring programme.

http://dramarnathgiri.blogspot.com/2016/12/importance-of-national-ambient-air.html

Air Pollutant includes any substance in solid, liquid or gaseous form present in the atmosphere in concentrations which may tend to be injurious to all living creatures, property and environment. Various contaminants in different forms from both man-made and natural sources perpetually enter our environment and contaminate it causing toxicity, diseases and environmental decay. Recent industrialization and increased number of potent air polluting sources like automobiles, landfills, etc. has gushed into the atmosphere toxic materials which not only harm human health but are also a threat to the ecosystem in general. In order to arrest the deteriorating air quality, Government of India enacted Environment (Protection) Act, 1986, which was an umbrella act for the protection of all aspects of the environment. The government had also enacted the Air (Prevention and Control of Pollution) Act, 1981 with the aim of ensuring moderated pollution concentrations and hence safe ambient air quality.