Question

When hydrocarbon fuels burn in a plentiful supply of air they undergo complete combustion, forming carbon dioxide and water vapour. If the air supply is limited incomplete combustion occurs and carbon monoxide and carbon may be formed. Describe the problems that can be caused by these products of complete and incomplete combustion.

Answer 1

Problems of complete combustion. 1) CO2 is released into the environment, this is a greenshouse gas and contributes to global warming. 
Problems of incomplete combustion. 1) Carbon monoxide is toxic, as it's colourless, tasteless and odorless people cannot detect whether it is around them. 2) Carbon is formed in tiny pieces called particulates, these reach the atmosphere and cause global dimming. It can also provoke people with illnesses such as asthma.