This has led, not surprisingly, to a rapid increase in UK air pollution emissions, despite the recent introduction of emission controls. Diesel engines emit small particles, which are known to be toxic. Perhaps, one of the main pollutants from domestic sources, which effects urban air quality is black smoke, in areas where coal is still being used. Belfast is a prime example of this. Domestic sources cause emissions of nitrogen dioxide into the atmosphere through the use of gas fired appliances and oil stoves.
Power stations are still a the of urban air pollution.
Power generation may release sulphur dioxide and nitrogen dioxide into the atmosphere. Industry within urban areas can contribute significantly to air pollution. The main pollutants that are released are sulphur dioxide, nitrogen dioxide, metals, volatile organic compounds, carbon monoxide and particulate matter. Tighter emissions standards on cars, trucks and buses along with strict penalties for non compliance with legislation. Encouragement of car pooling and cycling.