Various types of chemicals used in modern agriculture such as inorganic fertilisers, pesticides and herbicides are also pollution-generating components. These chemicals are washed down to rivers, lakes and tanks. These chemicals also infiltrate the soil to reach the groundwater. Fertiliser induces an increase in the nitrate content of surface waters. Cultural activities such as pilgrimage, religious fairs, tourism, etc. also cause water pollution.

Mechanised construction and demolition work, automobiles and aircraft, sirens and loudspeakers are the major pollutants of which type of pollution?

Noise pollution

The main sources of noise pollution are various factories, mechanised construction and demolition works, automobiles and aircraft, etc. There may be added periodical but polluting noise from sirens, loudspeakers used in various festivals, programme associated with community activities.