Toxic Pollution in Water
Agriculture, mining, oil drilling, and many other
industries dump chemical wastes into water sources. This makes the water unsafe
to drink or to use for preparing food, for bathing, or for irrigation.
In some places, water may be contaminated by toxics
that naturally exist in the earth, such as arsenic and fluoride (a natural
substance that causes brown spots on teeth and severe bone weakness). As the
groundwater is used up, the risk of natural toxics grows because they are
concentrated in the water that is left.
Whether they are from industry or from the earth
itself, toxic chemicals are usually invisible and difficult to detect. Testing
water in a laboratory, possibly at a university, can help detect both natural
toxics and chemicals from 6 hours of collecting it
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