Mankind has created pollution, and has suffered its consequences since time immemorial. This has intesified greatly since the industrial revolution. One of the main problems in society, and a major function of government is how to cope with this pollution. 80 years ago the maxim used to be "the solution to pollution is dilution"; to dilute any pollted water supply in a large river, or to build a tall chimney stack to dilute air pollutants into the air so that concentrations of pollutants are always low. Since 1950 western countries have gone further and made major attempts to reduce the...