Most western countries have some control program for U.S. criteria pollutants. Inter-country transport of air pollutants is a subject of study and concern. However, in most European countries, control of toxic air pollutants is not yet the subject of a regulatory program. Sweden has an action program to reduce or ban the use of harmful chemicals. The Swedes have identified thirteen compounds or categories of compounds for this program, including methylene chloride, trichloroethylene, tetrachloroethylene, lead and lead compounds, organotin compounds, chloroparaf-fins, phthalates, arsenic and its compounds, creosote, cad-
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