The US slashed air pollution over the past 60 years. But on Thursday, US cities suffered some of the world’s worst air.

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Olympian Quinn warns Canada is ‘a few steps behind’ U.S. on anti-Trans policies After making international headlines as the ...

Dense wildfire smoke billowing down from Canada and northern Minnesota has set off unhealthy air quality alerts across the US ...

Ferrari’s ultra-reliable SF-26 is hunting down a fragile Mercedes. Can Charles Leclerc and Lewis Hamilton close the gap in a wet Spa?