Ecological Problems of Kazakhstan

Автор работы: Пользователь скрыл имя, 11 Февраля 2013 в 16:01, реферат

Описание

Lead and its toxic compounds are dangerous environmental pollutants. The influence of these substances on the health of human beings, especially children, who are the most vulnerable to the harmful impact of lead, is worthy of special study, for the following reasons:
- lead is widespread (practically everywhere) in places where people reside;

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