Effects of Pollution – Notes
Air Pollution and Its Control
An undesirable change in the physical, chemical or biological characteristics of air, water, land or soil that may have detrimental effects on living organisms is called pollution.
Substances that bring about such undesirable changes are called pollutants.
Common air pollutants are automobile exhausts, chemicals and toxic gases from industries and natural particulate matter such as dust, pollen and ash.
The usage of CNG, unleaded and low- sulphur petrol and diesel, catalytic converters and the implementation of stringent pollution level norms can reduce air pollution.
Noise is also considered as an air pollutant.
Green House Effect and Global Warming
The greenhouse effect is the heating of the earth’s surface due to greenhouse gases such as carbon dioxide, methane, nitrous oxide and ozone.