A student performed an investigation to see what would happen when an iron nail is added to a copper sulfate solution. Below is the chemical equation that shows what happens when iron is combined with copper sulfate. Use information from the chemical equation to answer the question.
Responses may be used more than once.
Fe
+
CuSO4
Cu
+
FeSO4
iron
copper sulfate
copper
iron sulfate

A. Pollution

Explanation:

Fossil fuels are the fuels which are excavated from undersurface and deep regions of the the earth crust. These are produce by millions of years of decomposition activity of soil microbes on organic matter generated after dead and decaying plants and animals. These fossil fuels are used as a source of energy.

The fossil fuels like coal, petroleum and natural gas produces toxic,harmful and polluting gases like carbon dioxide, carbon monoxide, nitrous oxides on combustion and burning. These gases contaminate the air and water hence causes pollution.

Therefore, the main advantage of using fossil fuel is pollution.