Question

How coal is dual source of energy?

Answer 1

Hello user

First of all it can be used to make fire

Second, it also can convert to other forms and other used as reserve source of energy and for extraction other form of energy

Answer 2

Coal is one of the highly preferred forms of energy.  It can be used in different ways. At first, it is used for making fire.  

Along with this, it will convert to other forms as well as others used as the reserve energy source and for extracting other energy forms.

The most significant uses of coal are that it allows you to generate electricity, produce steel and much more.