In addition, climate-induced changes in the formation and persistence of pollens, spores, and certain pollutants could promote more asthma, allergic disorders, and cardio-respiratory diseases. Warmer seas could influence the spread of disease, i.e., a correlation between cholera cases and sea surface temperature, an association between El Nino and epidemics of malaria and dengue, enhanced production of aquatic pathogens and biotoxins jeopardizing the safety of sea foods, and the increasing occurrence of toxic algal blooms.