Where does the energy of natural gas come from?

Answer 1

The energy came from the sun, 300 million years ago, when the fossil fuel was formed.

Answer 2

The energy in natural gas comes from the organic material of ancient plants and tiny sea creatures that decomposed under heat and pressure over millions of years, turning into gas. This stored energy is released when natural gas is burned for heating, electricity generation, or other uses.

Answer 3

Originally from the sun, when it grew the vegetation that 300 million years ago began to turn into natural gas.