Answer: hydrochloric acid
Explanation:
When fossil fuels are burned either partial or in complete combustion results in the formation of the sulfur dioxide, nitrogen oxides, carbon monoxide and carbon dioxide. These oxides are released in the air. These oxides when combine with the water and oxygen results in the formation of substances such as sulfuric acids, carbonic acid and nitric acids. These acids again becomes the part of the biosphere and hydrosphere as these acids condense in the form of acid rain. Hydrochloric acid does not form with fossil fuel emissions.
