1 - For forty years or more, the pesticides used by farmers all over the country have been blamed for the contamination of water supplies in Britain.

2 - The air we breathe is often dirty and contaminated with pollutants, particularly in urban areas.

3 - Biodiversity decline can result from excessive hunting, environmental contamination, or habitat loss and there are a variety of ways to combat these sources of decline.

4 - Radioactively contaminated land can be found in many parts of the world as a consequence of nuclear weapons testing and incidents at reprocessing plants.

5 - The air we breathe can be contaminated with pollutants from factories, vehicles, power plants, and many other sources.