Scientists described the results of their attempts to correlate pollution levels with various complaints of patients…. As expected, when smog increased, so did incidence of eye irritation, pulmonary disorders and nosebleeds…. Finally, for reasons not yet understood, more patients complained of animal bites on days when the air contained more suspended particulate matter.
Air pollution appears to lead to more aggressive behavior in other animals too. For example, the risk of dogs biting people goes up on smoggy days, an analysis of nearly 70,000 U.S. cases found. More bites occurred with increasing ground-level ozone, which occurs when pollutants chemically react in sunlight (SN: 12/8/21), scientists reported in December on the preprint server Research Square. The dogs’ aggression may be due to a stress response or brain impacts from the ozone exposure, the researchers suggest.