Lead is a persistent and troubling pollutant that accumulates in the body and causes brain damage, kidney failure and anemia. Even so, leaded fuel is still the norm in much of the world. In 1986, lead-free fuel accounted for only five per cent of total gasoline sales in Europe. In Mexico City air, lead levels are so high that doctors estimate children will suffer an average IQ loss of five points. Once thought to be harmless, these indestructible molecules climb to the upper atmosphere where they attack the ozone layer.
Ozone shields the earth from ultraviolet light which burns plants and causes skin cancer.
Another 50 per cent of CFCs are used in molded foam to make auto interiors and exteriors.