It’s the first day of fall here in the Northern Hemisphere! For anyone driving through farm country or woods, that means it’s time to be extra vigilant for deer on the road. Deer cause over 1 million accidents in the U.S. every year. Tom Langen studies animal behavior at Clarkson University and has some tips for staying safe. It turns out that time of day, week and month, as well as the season, can all significantly raise your risk of a crash.

And Tufts’ Laura Corlin unpacks the World Health Organization’s newly released air quality standards and what scientists now know about the high health risks from air pollution.

Also today:

Stacy Morford

Environment + Climate Editor

Deer cross roads whenever they wish, but some time periods are higher risk than others. Josh Edelson/AFP via Getty Images

Fall means more deer on the road: 4 ways time of day, month and year raise your risk of crashes

Tom Langen, Clarkson University

Avoiding hitting deer on the road is as much about when you drive as where. An animal behavior expert explains why.

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