(a) Ferrous Minerals:
Ferrous minerals account for about three-fourths of the total value of the production of metallic minerals. They provide a strong base for the development of metallurgical industries. India exports substantial quantities of ferrous minerals after meeting her internal demands.

(b) Non-ferrous Minerals:
India’s reserves and production of non- ferrous minerals is not very satisfactory. However, these minerals, which include copper, bauxite, lead, zinc, and gold, play a vital role in a number of metallurgical, engineering, and electrical industries. Let us study the distribution of copper and bauxite.

Conventional sources of energy

·         Conventional source of energy has been used since the early times.

·         Coal, Petroleum, natural gas, hydroelectricity, thermal power are the source of energy.

·         All conventional sources of energy except hydro-electricity are exhaustible.

·         These sources cause environmental pollution.

·         These sources require huge capital.

Non-Conventional Sources of Energy:

·         Non- the conventional sources of energy have come into use only recently.

·         Wind energy, solar energy, tidal energy, geothermal, biogas are examples of these sources of energy.

·         Most of the non- conventional sources of energy are inexhaustible.

·         These sources do not cause environmental pollution.