Nobody likes smog. Aerosol pollution, a mucky particulate cocktail of soot, dust, chemical fumes, and other compounds that linger in the atmosphere, is a worldwide problem. It’s unsightly, triggers environmental harms like acid rain, and is terrible for the health of humans and wildlife alike. Scientists and environmental advocates generally agree: We want cleaner air. But a new study suggests we should be careful about what we wish for, or at least mindful of the route we take to get there.
