A new study in the journal Proceedings of the National Academy of Sciences was published on Monday. The researchers in the study found a strong link between planetary warming and pollen seasons. That could mean more misery for allergy-sufferers in the years ahead. The study shows that the combination of warmer air plus more carbon dioxide in the atmosphere has caused North American pollen seasons since 1990 to start some 20 days earlier, on average, and to have 21 percent more pollen. The greatest pollen increases came from trees. You can read more about it at https://www.nytimes.com/2021/02/08/climate/climate-change-pollen-season.html.
