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Science 21 May 2004:
Vol. 304. no. 5674, p. 1093
DOI: 10.1126/science.304.5674.1093c
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ScienceScope

The United Nations' Stockholm Convention on Persistent Organic Pollutants entered into force this week, ending or severely restricting the use of 12 toxic substances (Science, 15 December 2000, p. 2053). The "dirty dozen" chemicals--which include the pesticide DDT and PCBs used in electrical equipment and paints--have been linked to birth defects, cancers, and immune and nervous system damage.

The list of 59 nations that have ratified the 2001 treaty doesn't include the United States and the European Union. About 25 countries will be allowed to continue using DDT against malaria-spreading mosquitoes until a viable alternative is found. Meanwhile, experts want to add other chemicals, such as flame retardants.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)