Та мессежээ энд үлдээж болно, бид танд шууд имэйл илгээх болно.
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For example, in 2010, more than 400 children died in Zamfara, Nigeria from acute lead poisoning caused by unsafe mining and processing leadcontaining gold ore.
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Lead Mining – The Northern Echo. From about 1750 to 1850 lead mining was big business and Britain was the . a special process caled crystalization which was ...
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