Cottage and Small-scale Industries
Small-scale industries (SSI) and cottage industries (CI) can be established easily within a short span of time. They produce at a greater speed and consequently provide faster returns to their owners.
Geography
Ocean Currents
Ocean currents are the regular movements of water in the oceans. They move in a circular pattern around the oceans. Based on temperature and depth,
Natural Regions of the World
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.
Abatement of Pollution
Sources of water pollution which cause inflow of pollutants over a large area are known as non-point sources. Example: Runoff from agricultural fields.
Effects of Pollution
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.
Types of Pollution
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.
Sources of Pollution
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 and types of winds
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.
Isolation and heat balance
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.
Importance of Oceans
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.