Economic activities can be classified into: Primary activities Secondary activities, and Tertiary activities

Primary activities include activities like agriculture, fishing, mining, etc. Secondary activities include industries like cotton textile, sugar industry, medicine industry, etc. Tertiary activities include law system, banking activities, etc.

Industries can be classified on the basis of raw materials, size and ownership. They may be agro based, mineral based, marine based and forest based depending on the type of raw material used. On the basis of size, there can be small scale and large scale industries. On the basis of ownership, industries can be classified into private sector, public sector, joint sector and cooperative sector.

There are various factors that affect the location of industries. Some of them are geographical factors, commercial factors, raw materials, water supply, energy supply, transport, labour, market and climate.

An industrial system comprises of: Inputs, which includes raw materials Processes, which comprises of machines and technology, and Finally the output, which comes out from the industry

Industrial regions emerge when a number of industries settle close to each other, and share the benefits of their closeness. The three major industries of India are: Iron and Steel Industry Textile Industry, and Information Technology Industry

Disasters caused by industries, either by accident, negligence or incompetence are known as industrial disasters. Some of the preventive measures for industrial disasters are: Densely populated residential areas should be located far away from the industrial areas. People staying in the vicinity of industries should be aware of the storage of toxins and hazardous substances and, their possible effects in case of accidents. Fire warning and fighting system should be improved. Pollution dispersion qualities in the industries should be improved.

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