Which fossil fuel is formed under earth by the decomposition of vegetable matter lying under water by anaerobic bacteria in the absence of oxygen?

Explanation

Natural gas• It is a fossil energy source. • The largest component of natural gas is methane. • It is colourless, shapeless, and odourless in its pure form. • It is formed under the earth by the decomposition of the vegetable matter lying underwater by anaerobic bacteria in the absence of oxygen.