Allergists say that pollen season in the U.S. used to start around St. Patrick’s Day and now often starts around Valentine’s Day. Scientists see climate change as the culprit.
As the world warms, allergy season will start weeks earlier and end many days later — and it’ll be worse while it lasts, with pollen levels that could as much as triple in some places, according to a new study Tuesday in the journal Nature Communications.
Allergists say that pollen season in the U.S. used to start around St. Patrick’s Day and now often starts around Valentine’s Day. Already about 30% of the world and 40% of American children suffer pollen allergies, which hurt the economy through lost work days and medical costs, said University of Michigan climate researcher Yingxiao Zhang, lead author of the new study.
The start of alder tree pollen season will move most dramatically, an issue in the Pacific Northwest. Cypress tree pollen — which is especially bad in Texas — will see among the biggest increases.
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