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The drying up of the Aral Sea has been described as the most staggering environmental disasters on the 2oh Century. Over the last 40 years over 33,000 km2 of the former sea bed have been exposed creating a significant dust source. It is widely believed, but little researched, that increased dust storm activity in the region has had a major impact on health. In this paper we report the preliminary findings of a year long study into the link between dust exposure and respiratory health amongst children in the Republic of Karakalpakstan, located immediately down wind of the Aral Sea. The findings indicated that dust deposition rates across the region are high with sites located on the delta being the worst effected. However, there is an apparent inverse relationship between total dust exposure and respiratory health. Analysis of grain size indicated that dust deposited at sites located on the delta is predominantly of local origin. Although dust deposition rates away from the delta region are lower, the dust is predominantly of non-local origin and is considerably finer with high levels of PM10. These data indicate that the physical and chemical nature of the dust rather than the total amount is a more important. However, the links are likely to Transactions on Biomedicine and Health vol 5, © 2001 WIT Press, www.witpress.com, ISSN 1743-3525

wit transactions on biomedicine and health

Dust exposure and respiratory health amongst children in the environmental disaster zone of Karakalpakstan, Central Asia: preliminary findings of the ASARD project.