Ecological Problems of Kazakhstan DECREASING THE DANGERS OF THE IMPACT OF LEAD ON CHILDREN IN THE REPUBLIC OF KAZAKHSTAN Tatyana SLAZHNEVA, doctor of medicine, professor, Deputy General Director of the National Healthy Lifestyle Center, Almaty, Kazakhstan. Andrei KORCHEVSKY, candidate of medicine, Executive Director of the Center for Healthcare and Environmental Design, Almaty, Kazakhstan. Alexander MOKRYSHEV, candidate of technical sciences, assistant professor at the Almaty Institute of Power Engineering and Communications Almaty, Kazakhstan. Received in revised form July 8, 2004 Lead and its toxic compounds are dangerous environmental pollutants.

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One of the largest global environmental disasters in the recent history which is being experienced by countries and the population of 62 million people in Central Asia, is the tragedy of the Aral Sea that in its environmental, climatic, socio-economic and humanitarian consequences poses direct threat to the region's sustainable development, health, gene pool and future of the people residing in it. The Aral Sea, which was once a unique, beautiful and one of the largest closed water reservoirs in the world, is practically on the verge of complete disappearance and turned into an unprecedented disaster and irreparable damage to the life of the population living there, the ecosystem and biodiversity of the Aral Sea. Until 1960 the Aral Sea had an area of 68.9 thousand km² with the volume of water 1083 cubic km, its length extended to 426 km, width - 284 km, the greatest depth was 68 m. The Aral Sea area was a region with a wide variety of flora and fauna, 38 species of fish and a number of rare species of animals inhabited the Aral Sea basins, the number of saigas reached 1 million heads, the floristic composition comprised 638 species of higher plants.

In addition, the Aral Sea played an important role in the development of the region's economy, its production sectors, in ensuring employment of the population, and in the formation of a stable social infrastructure. In the past, the sea was among the richest of fishing grounds in the world: the annual catch of fish in the reservoirs of the Aral Sea was 30-35 thousand tons. More than 80% of the inhabitants of the Aral Sea coast were engaged in the production, processing and transportation of fish and fish products. Fertile lands of the delta of the Amudarya and Syrdarya rivers, as well as highly productive pastures provided employment for more than 100 thousand people in the sphere of livestock, poultry farming, growing of agricultural crops. The sea also served as a climate-adjusting reservoir and mitigated the sharp weather fluctuations throughout the region, which had a favorable effect on the living conditions of the population, agricultural production and the ecological situation.

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