This is a term paper on AIR pollution. It has some causes and effects, etc. It mainly has to do with how and why the pollution is occurring.

Air pollution is one of the most devastating forms of pollution. It occurs almost everywhere on Earth, especially in large cities. It harms people by causing breathing problems and sicknesses like cancer. Many plants, animals, and their habitats are damaged by air pollution. Many pollutants do not disappear from Earth's atmosphere, returning as acid rain and snow. CFCs, or chlorofluorocarbons, destroy the ozone, allowing in more of the sun's dangerous radiation. Moreover, our atmosphere is …

…normal oxygen molecules that do not absorb UV rays. After this transformation, the chlorine atom remains the same as before, therefore it can continue to destroy as many as one hundred thousand ozone molecules. Nitrous oxide (fertilizer) and methyl bromide (pesticide) also break down the ozone, but to a lesser degree. For this reason, the use of CFCs has decreased dramatically. However, CFC molecules already released will be attacking the ozone for years to come.