Auckland’s air is getting cleaner thanks to electric cars and stricter exhaust standards—but road dust is now the bigger culprit. New research shows that even as fumes improve, heavy vehicles over 3.5 tonnes are stirring up more particles from roads, making them a major health risk. Unlike tailpipe emissions, road dust can’t be fixed with stickers or regulations—it comes from tires, brakes, and pavement—and still causes breathing and heart problems. The study, based on data from 2006 to 2019 at just three sites, warns we can’t ignore this invisible pollution as we celebrate cleaner engines.
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