Which fuel is used in thermal power plant? What are the problems associated with this type of power generation?

Explanation

In the thermal power plant coal is used as a fuel. Problems created by thermal power plant:
(i) The combustion of coal results in emission of gases like `CO_2,NO_2,SO_2`, which causes air pollution.
(ii) During combustion of coal, soot is formed thus carbon particles added to air can cause respiratory problems.
(iii) Large amount of coal is required for this plant which may deplete the coal reserves rapidly. In the shortage or lack of coal the thermal power plant could be shut down.