Vegetation which grows in a natural region without any human interference is known as natural
vegetation. A natural region is a basic geographic unit which is characterised by its common natural
features of geography, geology and climate.
Sources of water pollution which cause inflow of pollutants over a large area are known as non-point sources. Example: Runoff from agricultural fields.
The presence of one or more harmful gases in the atmosphere is known as air pollution. Apart from these, solid particles like dust also pollute the air.
Smog is formed as a result of air pollution. Smog is an air pollutant which is the mixture of fog, smoke and dust particles. It is formed in areas which have large concentration of industries.
Carbon dioxide, carbon monoxide, nitrogen monoxide and unburnt hydrocarbons are some major sources of pollution. Metropolitan cities in India such as Delhi, Kolkata and Mumbai suffer from acute air pollution.
Pressure belts are seasonally identical horizontal pressure variations created in the earth’s atmosphere just above the earth’s surface due to seasonal and spatial variation of energy received by the earth at different places.
The Sun is the source of light and heat on the Earth. In this note you are going to learn about Isolation and heat balance. The radiation of the Sun is made of three parts—white light (which we see), infrared radiation and ultraviolet radiation.
The importance of oceanic resources has created disputes regarding the control of oceans by various nations. Many nations claim their rights over sea waters located near their land.
The rise and fall of seawater because of the gravitational forces of the Sun and the Moon are called tides. Sea waves produced by tides are known as tidal waves.
Orogenic Processes includes mountain building through severe folding and faulting. In folding, because the compressional forces act from two opposite sides towards the centre