(Bloomberg) -- Just 30 miles from Johannesburg, in a South African region known as the Vaal Triangle, 1.7 million people are living in a crossfire of some of the most dangerous pollution on Earth.Most Read from BloombergTrump Warns of Big Losses From Asset Sales During Property SlumpFed’s Preferred Inflation Metric Increases by Most in a YearStocks End Month at New Highs After Inflation Data: Markets WrapBiden Amasses Cash Lead as Trump Bleeds Money in 2024 FightFrom the highway into Vanderbijlp