Question

Write your question here (Keep it simple and clear to get the best answer)how did we prepare coal

Answer 1

Answer:

By the swamps

Explanation:

Millions of yrs ago, there used to be swamps except greenery. All the dead plants and animals fell into these swamps forming layers. After many yrs, the bottom layers used to harden because of the extreme heat and energy of the sun. These layers harden to form coal. It takes millions of yrs for the formation of coal