Apart from heatwaves, higher temperatures can increase ground-level ozone and hasten the onset of the pollen season, contributing to asthma attacks.
除了热浪，气温升高可增加地面的臭氧并使花粉季节提前开始，从而造成哮喘发作。
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Especially if you're a morning guy—pollen counts are highest between 5 a.m. and 10 a.m. says Fred Pescatore, M.D., author of The Allergy and Asthma Cure.