Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable sources of energy whereas wood is a renewable sources of energy?

Question

Philoid · Accepted Answer

Coal is considered to be a non-renewable source of energy whereas wood is a renewable source of energy because coal is formed when dead plants got buried under the earth for a long period of time. It took millions of years to be replenished. So coal is considered to be non renewable source of energy.