4.3 Burning Fuels
When pure hydrocarbons burn completely they are oxidised to carbon dioxide and water.
In a limits supply of air incomplete combustion may produce carbon monoxide.
Carbon may also be produced and some hydrocarbons may not burn. This produces solid particles that contain soot (carbon) and hydrocarbons called particulates.
Most fossil fuels contain sulphur compounds. When the fuel burns these sulphur compounds produce sulphur dioxide causing acid rain.
At high temperatures oxygen and nitrogen in the air may combine to form nitrogen oxides, causing acid rain.