Question

How does coal form? And how is coal helpful?​

Answer 1

Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.Coal is primarily used as a fuel.

Answer 2

Explanation:

Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. ... As of 2016, coal remains an important fuel as it supplied about a quarter of the world's primary energy and two-fifths of electricity.