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Source: The Christian Science Monitor
Summary:
From Hungary to Chile to the United States, people are drinking from arsenic-tainted wells dug from the 1970s to the present.
MIT Team created a filter with layers of sand, brick chips, gravel, and iron nails, which chemically bind arsenic to them as one solution.
Shallower surface wells that don't reach down into arsenic-tainted aquifers cost about $1,000 for a well that could supply 300 to 500 people.
Conclusion: These wells were originally built to prevent tainted drinking water from the surface, but researchers neglected to test for arsenic, now researchers scramble to fix this new
problem.
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