Question

How coal is formed? Explain in detail

Answer 1

Answer:

Coal formed millions of years ago when the earth was covered with huge swampy forests where plants - giant ferns, reeds and mosses - grew. ... Heat and pressure produced chemical and physical changes in the plant layers which forced out oxygen and left rich carbon deposits.

Answer 2

Answer:

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.

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. Vast deposits of coal originate in former wetlands—called coal forests—that covered much of the Earth's tropical land areas during the late Carboniferous (Pennsylvanian) and Permian times. However, many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras.