Scientists cannot explain why both the quality and quantity of sperm have been dropping since the 1940s. Indications are pollutants may be responsible.

Pollution is leading to a higher incidence of asthma, and studies show that a commonly used treatment may increase the risk of death from the disease

Premature deaths and disease caused by a polluted environment is the most pressing problem in the world today, says a WHO report prepared for the Earth Summit

Some now ways of using fortilisers which will prevent nitrogen seepage into the water table