As the world warms, allergy season will start weeks earlier and end many days later, and it'll be worse while it lasts, according to a new study.
Climate change has already made allergy season longer and pollen counts higher, but you ain't sneezed nothing yet.
Warmer weather allows plants to start blooming earlier and keeps them blooming later. Meanwhile, additional carbon dioxide in the air from burning fuels such as coal, gasoline and natural gas helps plants produce more pollen, said study co-author Allison Steiner, a University of Michigan climate scientist.
The new study found that allergy season would stretch even longer and the total amount of pollen would skyrocket. How long and how much depends on the particular pollen, the location and how much greenhouse gas emissions are put in the air. Allergies are especially difficult for the 25 million Americans with asthma. This could make the problem much worse for them, said Amir Sapkota, a University of Maryland environmental health professor, who wasn't part of the research.
Ragweed and grasses — common pollen allergies — will also have longer seasons and higher pollen counts in the future, Zhang said.
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