Just about every day, someone claims that the air is cleaner. That, we are told, is a small benefit of the coronavirus-induced economic lockdowns. By reducing traffic on our roads, we are polluting the air less, providing a visible example of the supposed benefits of imposing more environmental regulation.
In my hometown of Seattle, one environmental activist told the local paper that people can “physically see that difference in the cleaner air.” The air-quality data tell a different story.
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