Achoo! Climate Change Lengthening Pollen Season in U.S., Study Shows

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https://www.nytimes.com/2021/02/08/climate/climate-change-pollen-season.html

Source: By John Schwartz, The New York Times. 

Excerpt: New research suggests that climate change is responsible for longer pollen seasons in the United States and more pollen in the air, as well. ...Among the many disasters climate change is wreaking around the world, scientists have now identified a more personal one: It’s making allergy season worse. That is the message of a new study in the journal Proceedings of the National Academy of Sciences published on Monday. ...According to the new paper, the combination of warming air and higher levels of carbon dioxide in the atmosphere has caused North American pollen seasons since 1990 to start some 20 days earlier, on average, and to have 21 percent more pollen. ...The most pronounced effects were seen in Texas, the Midwest and the Southeast, said William Anderegg, an assistant professor of biology at the University of Utah and the lead author of the new study. The effects were less obvious in the northern United States, including New England and the Great Lakes states. The greatest pollen increases came from trees, as opposed to grasses and weeds, he said.... 

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