People have noted correlations between climate change and allergy increase: <a href="http:&#x2F;&#x2F;fightthecauseofallergy.org&#x2F;page&#x2F;climate-change-and-allergy" rel="nofollow">http:&#x2F;&#x2F;fightthecauseofallergy.org&#x2F;page&#x2F;climate-change-and-al...</a>