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Made in Hertfordshire: The catalytic converter
It鈥檚 50 years since Johnson Matthey in Royston developed a way to reduce car emissions. It鈥檚 estimated 40 tonnes of pollutants are prevented from entering the air every minute because of this invention. We spoke to Dennis Webster, a former employee who was part of the team who developed the technology, and to the company鈥檚 current Strategic Project Director, Chris Morgan. Photo: Getty Images.
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