Climate change is significantly impacting aerobiology through increased pollen production, extended pollen seasons, enhanced allergenicity due to higher CO2 and ozone levels, and shifts in plant distribution patterns, while also affecting fungal spore concentrations and distribution. These changes are worsening allergic rhinitis, nonallergic rhinitis, and chronic rhinosinusitis by disrupting epithelial barriers, triggering eosinophilic inflammation, and acting as adjuvants that stimulate IgE-mediated responses, with air pollutants and greenhouse gases compounding these effect.