(THE CONVERSATION) Since the 1940s, companies have been using PFAS – perfluoroalkyl and polyfluoroalkyl substances – to make products easier to use, from Teflon nonstick pots to waterproof rain gear, ...
The George Rogers Clark Memorial bridge crosses the Ohio River to Louisville, Kentucky. (Visions of America/Joseph Sohm | Universal Images Group via Getty Images) The Ohio River sends billions of ...
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