"American Chemist's Tea Advice Sparks Transatlantic Controversy"

TL;DR
An American chemist's unconventional recipe for the perfect cup of tea has sparked controversy in England, with Brits expressing shock and dismay at the suggestion of adding salt or warm milk to their beloved beverage.
- An American chemist's take on the perfect cup of tea causes a stir in England NPR
- A US scientist outrages the British with advice about tea – and the American embassy stirs it up CNN
- The Biggest British-American Tea Kerfuffle Since … Well, You Know The New York Times
- US scientist recommends adding salt to make perfect cup of tea BBC.com
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