Trend sees higher pollen levels and worsened allergy and asthma symptoms, though reduction in carbon emissions could reverse it
As the global temperature has increased in recent years due to climate change, allergy season in the US is starting earlier and the amount of pollen during such periods has increased, leading to worse allergy and asthma symptoms for some – and new symptoms altogether for others, according to scientists.
Some of the biggest recent changes in pollen levels in the US have occurred in the south-east and Texas and through some of the midwest, said William Anderegg, director of the Wilkes Center for Climate Science and Policy at University of Utah and an author of the National Academy study. While an allergy spray, Flonase, has helped control most of the symptoms, he has not been able to find anything that provides relief for his eyes.
To address the worsening allergy season, the US also needs more stations to measure the amount of pollen, said Anderegg. Whereas there are thousands of stations which measure ozone and air pollutant levels, some states only have one pollen station or none, he said.
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