Charlene: Environmental cleanup increasingly relies on microorganisms to metabolize pollutants. This has its limitations, though, since microbes become less active when a region' s temperature drops below normal. Olaf: I don' t think that' s right. Researchers studying oil spills in the Arctic and subtropical regions measured the carbon dioxide output of organisms that digest petroleum pollutants and found that Arctic and subtropical microbes ate oil at nearly the same rate. Olaf's reply suggests that he misinterprets Charlene's use of the term ['cleanup', 'active', 'limitations', 'normal']