A fungus that produces more spores when atmospheric carbon dioxide is higher is likely to cause more airway irritation as global warming continues, reports Physician’s Briefing.

For this study, the research team exposed cells from the linings of human airways to Alternaria and found it produced more cell damage. They warned that climate change might intensify the problem.

“These results suggest that continuing increases in atmospheric CO2 associated with global climate change will increase both the level of Alternaria exposure and antigenicity of spores that come in contact with the airways,” the authors write.

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