What is air pollution?
An air pollutant is anything in the air that could harm people’s health. There are many pollutants in the air.
You can also read about indoor air pollution.
Levels of air pollution vary across the UK. Higher levels are generally found in most UK towns and cities. This is where sources of pollution, such as road traffic, are more concentrated. In the country, farming can also be a source of air pollution.
The amount of air pollution can also change depending on the weather and the season. For example, it’s harder for pollution to disperse during still, sunny weather in summer and still, foggy weather in winter. This means pollution becomes more concentrated causing a high pollution episode. These episodes often affect towns and cities, but they can also affect areas of the countryside as the wind can blow pollution across the country.