Allergy season is getting longer and there’s more pollen in the air.
That’s bad news for people with seasonal allergies, and the situation is unlikely to improve until the climate stops warming, experts say.
A recent study found that pollen season increased by 20 days annually between 1990 and 2018, while pollen concentrations in North America increased 21 percent over the same time period.
The pollen in the air may also be increasingly potent and thus more allergenic, the study found.
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