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Robert Bilott is an American lawyer who, in the 1990s defended big corporations, including chemical companies.聽One day he got a call from a farmer called Wilbur Earl Tennant, whose cattle were dying.聽Mr Tennant thought something was wrong with his cattle's drinking water.

Robert took on what he thought would be a simple case. But what he uncovered was an environmental crisis affecting thousands of people. It became a fight against one of the world鈥檚 biggest chemical companies, DuPont.

A chemical 鈥� PFOA - used in the production of Teflon - had been making its way into the water supply of several towns along the Ohio River. Now this was an unregulated chemical - but studies obtained by Robert as part of the lawsuit against DuPont appeared to show that it could cause cancer in rats and that it could make its way into human blood.

Robert became concerned people didn鈥檛 realise the chemical could be found in drinking water.聽He launched a class-action lawsuit against DuPont on behalf of 70,000 people whose water was affected by PFOA.聽It took six years for a team of independent scientists to conclude a "probable link" between PFOA and a list of health conditions including kidney cancer and thyroid disease.聽

In 2017 DuPont settled over 3,500 PFOA lawsuits for a total of 671 million dollars.

DuPont denies any wrongdoing - the company told us: "We are committed to upholding the highest standards for the wellbeing of our employees, our customers and the communities in which we operate.聽 In 2006, historical DuPont announced its commitment to discontinue manufacture, purchase, or use of PFOA鈥�.

Robert has written a book about what happened called 'Exposure', and a major feature film has been made about his story called 'Dark Waters' where Robert is played by the actor Mark Ruffalo.

Producer: June Christie
Presenter: Emily Webb

(Photo: Robert Bilott. Credit: Getty Images)

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