Carbon Dioxide - Caused by complete combustion - It increases temperatures.
Sulphur Dioxide - Caused by burning fuels, when sulphur reacts with oxygen - Causes Acid Rain
Nitrogen Oxide - Caused by Nitrogen and Oxygen reacting in hot engines. - Causes Acid rain
Explain why soot is formed when some fossil fuels are burned:incomplete combustion because of lack of oxygen.
Explain how reducing the amount of sulfur in fossil fuels reduces the erosion of limestone:Sulfur reacts with oxygen to form sulfur dioxide, less sulfur dioxide emitted, less acid rain, lesss limestone reacts with acid rain.
Explain why oxides of nitrogen are formed in car engines: Car engines work a very high temperatures, so nitrogen reacts with the air.