More real-world evidence that PM2.5 in outdoor doesn’t kill

A new study in JAMA reports that among people who smoke a pack of cigarettes a day for 20 years, the risk of cardiovascular disease returns to that of a nonsmoker for 10-15 years after quitting. Here’s what this means for PM2.5 in outdoor air.

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A cautionary word on extreme temperatures during heat waves…

We have been told that the July 2019 European heat wave brought record hot temps — e.g., 101.7F at the Cambridge University Botanic Garden in eastern England and 114.6 in France. But check out what happened 75 years ago on August 14, 1944 in New York City.

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