According to the World Health Organization (WHO), mercury is a naturally occurring element that is found in air, water, and soil. Exposure to mercury, even in small amounts, may cause serious health problems and is a threat to the development of the child in-utero and early in life.
read more... https://www.thecitizen.co.tz/tanzania/news/national/using-mercury-in-small-scale-mining-stays-a-major-threat-4018364
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