Why are coal oil and natural gas considered to be non renewable energy sources?

Coal, oil, and natural gas are considered non-renewable energy sources because they are formed over millions of years from the remains of ancient plants and animals, and their formation takes far longer than current human consumption rates. Once extracted and used, these fossil fuels cannot be replenished within a human time scale, leading to depletion. Their extraction and use also contribute to environmental issues, such as greenhouse gas emissions and habitat destruction. As a result, reliance on these energy sources poses sustainability challenges for the future.