Air pollution can be formed through both natural and man-made processes. Some examples of these are listed below:
Natural Sources
Some of the natural sources of air pollution are organic compounds from plants, sea salt, suspended soils and dusts (e.g. from the Sahara).
Other natural sources are released during catastrophes such as volcanic eruptions and forest fires. Large amounts of harmful gases and smoke are released which can increase background pollution levels for years - even in areas far away from the original source. Ozone is one of the most common natural air pollutants.
Man Made Sources
Transport - Roads
Vehicles like cars, vans, buses and lorries run on petrol or diesel. When these fuels are burnt in the engine, pollutants are given out from the exhaust of the vehicles. This means road traffic is one of the biggest sources of air pollution on Jersey. Near busy roads the main pollutants are nitrogen oxides, carbon monoxide and particulate matter. Larger vehicles with bigger engines release more pollution in to the atmosphere.
Agriculture
Animals like cows and sheep release a massive amount of methane through belching and breaking wind.
Methane is a colourless gas which is produced in their stomachs when bacteria break down the food that they eat.
Across the whole world, livestock is the biggest source of methane. Methane is the second most important greenhouse gas which can cause climate change.
Industry and Power Generation
During the Industrial Revolution in the 1800s lots of factories were built near to the large towns and cities. There were few on Jersey but the pollution could be carried from nearby France. Today the main industrial hubs tend to be in the countryside away from cities. Nitrogen dioxide and sulphur dioxide are the main pollutants associated with industrial processes.
To generate electricity fuels such as coal, gas or oil are burned at power stations. When these fuels are burnt they release nitrogen oxides, sulphur dioxide and particulate matter as well as greenhouse gases which can cause climate change. Most of Jersey’s energy comes from nuclear power stations in France which, when working properly, emit relatively little pollution.
Waste
Waste disposal and livestock are the main emitters of Methane.
Methane is released into the atmosphere when the waste that we throw away decomposes. Methane is the second most important greenhouse gas after carbon dioxide, which means that it also contributes towards climate change.