Coal, oil and gas are called fossil fuels because they form over millions of years through the decay, burial and compaction of rotting vegetation on land (coal), and marine organisms on the sea floor (oil and gas).
(oil and gas; are called; fossil fuels; because they form over millions of years through the decay, burial and compaction of rotting vegetation on land) (they; form; )
oil and gas they
are called form
fossil fuels because they form over millions of years through the decay, burial and compaction of rotting vegetation on land