It's not burning that forms coal, oil, and natural gas. These are fossil fuels formed over millions of years from the remains of ancient organisms. Here's a breakdown:

* Coal: Formed from ancient plants that died and accumulated in swampy environments. Over time, pressure and heat transformed these plant remains into coal.

* Oil and Natural Gas: Formed from microscopic marine organisms that died and settled to the ocean floor. Over time, they were buried under layers of sediment and transformed by heat and pressure into oil and natural gas.

Burning is the process where these fossil fuels react with oxygen, releasing energy in the form of heat and light. It's the use of the fossil fuels, not their formation.