Perfectly Poisoned

Up to 75 million people in West Bengal and Bangladesh are drinking water contaminated with arsenic after an initiative to provide safe water went tragically wrong.

It was assumed that underground water which flowed from the Himalayas would be clean, when in fact it is laced with deadly arsenic which has unleashed a human tragedy described by experts as greater than Chernobyl or Bhopal.

Now millions of people are looking to the scientific community for help - and they're discovering there are no easy solutions. Jane Franchi reports.

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Up to 75 million people in West Bengal and Bangladesh are drinking water contaminated with arsenic after an initiative to provide safe water went tragically wrong.

It was assumed that underground water which flowed from the Himalayas would be clean, when in fact it is laced with deadly arsenic which has unleashed a human tragedy described by experts as greater than Chernobyl or Bhopal.

Now millions of people are looking to the scientific community for help - and they're discovering there are no easy solutions. Jane Franchi reports.