Answer : Fossil fuels are cheaper than alternative forms of energy.
Explanation : Fossil fuels are considered to be the rich sources from fossils which were crushed down under the layers of rocks millions of years ago. It is assumed that in certain areas of the world where the decomposition of millions of organisms occurred very long ago. It is found to be simpler in some ways to collect and is distributed widely. This was the argument that fits best to the conversation between the group of environmentalists who were discussing between the benefits and drawbacks which are associated with using fossil fuels.