Describe briefly the classification of industries …

On the basis of raw material used, industries are classified into followings:
(i)Agro based industries:  It uses plant and animal based products as their raw materials. Food processing, vegetable oil, cotton textile, dairy products and leather industries are examples of agro-based industries.
(ii)Mineral based industries:  These are primary industries that use mineral ores as their raw materials. The products of these industries feed other industries. Iron made from iron ore is the product of mineral based industry. This is used as raw material for the manufacture of a number of other products, such as heavy machinery, building materials and railway coaches.
(iii)Marine based industries:  It uses products from the sea and oceans as raw materials. Industries processing sea food or manufacturing fish oil are some examples.
(iv)Forest based industries:  This utilise forest produce as raw materials. The industries associated with forests are pulp and paper, pharmaceuticals, furniture and buildings.