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When asked about climate change, President Trump often shifts the focus to America’s “clean air.”
“We have the cleanest air in the world in the United States and it’s gotten better since I’m president,” he said again this month while meeting with Prime Minister Leo Varadkar of Ireland.
America’s air is much cleaner than it used to be, but it’s still not “the cleanest.” And recent data suggests that air pollution is ticking back up.