Weather and climate change are constant and ever-changing processes that impact allergy and asthma. The purpose of this report is to provide information since the last climate change review with focus on asthmatic disease. PubMed and internet searches for topics included climate and weather change, air pollution, particulate, greenhouse gasses, traffic, insect habitat, and mitigation, in addition to references contributed by the individual authors. Changes in patterns of outdoor aeroallergens due to increasing temperatures and amounts of carbon dioxide in the atmosphere are major factors linked to increased duration of pollen seasons, pollen production, and possibly increased allergenicity of pollen.
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