1.   Air pollution can cause breathing problems for some people.

2.   Pollution could cause changes to weather patterns on a global scale.

3.   Water pollution is causing the ruination of the fishing industry.

4.   Pollution caused the soil to acidify.

5.   A survey by German scientists has found that many fish in the North Sea suffer from tumours, bacterial ulcers and liver damage caused by pollution.

6.   Conflicting evidence is emerging of the recovery of the Gulf from the massive oil spills and other pollution caused during the war against Iraq two years ago.

7.   Caused by pollution from cars, power stations, even paint solvents.

8.   Another March study showed how atmospheric pollution causes healthy blood vessels to constrict, which can explain higher rates of respiratory and cardiovascular disease.

9.   A recent study out of Los Angeles for the first time found that air pollution may cause asthma and other respiratory problems, not just exacerbate them.

10.   But they have not quelled a debate over how much illness pollution causes.