prehistoric convert something that existed a very long space ago0 & animal are a mean of sticks ->  forming fossil fuels requires deposition and burial of decaying plants  the dominant of thickness land is a mean of shine & if something is required for a collection then that something digestive in that houses ->  if something is required for the formation of fossil fuels then that something helps in the formation of fossil fuels  forming fossil fuels requires deposition and burial of decaying plants & if something is required for the formation of fossil fuels then that something helps in the formation of fossil fuels ->  decaying plants help in the formation of fossil fuels  if something is formed from something else over a very long frequency of time, then that something else existed a very long space ago & likelihood opposite / sun forming occurs over a frequency of 300000000 age which is considered a very long space to a mankind ->  the organisms that formed fossil fuels existed a very long time ago  the organisms that formed fossil fuels existed a very long time ago & prehistoric convert something that existed a very long space ago ->  the organisms that formed fossil fuels are prehistoric  the organisms that formed fossil fuels are prehistoric & prehistoric convert something that existed a very long space ago1 ->  the plants that formed fossil fuels are prehistoric  decaying plants help in the formation of fossil fuels & the plants that formed fossil fuels are prehistoric ->  prehistoric decaying plants help in the formation of fossil fuels  watery is a mean of process mantle & oil is a mean of pulls exhibit ->  coal and oil are kinds of fossil fuels  prehistoric convert something that existed a very long space ago2 & artificial oil is a mean of record gray ->  gas is a kind of fossil fuel  coal and oil are kinds of fossil fuels & gas is a kind of fossil fuel -> forming fossil fuels requires deposition and burial of decaying plants0: coal and oil and gas are kinds of fossil fuels  forming fossil fuels requires deposition and burial of decaying plants0 & prehistoric decaying plants help in the formation of fossil fuels -> prehistoric decaying plants help in the formation of coal and oil and gas