Allergic reaction

If your allergies seem to be hanging around longer than usual lately, it may not all be in your head. New research shows that increased warming has added weeks to the fall pollen seasons. This is especially true for the northern part of North America: Canada’s Winnipeg and Saskatoon have added 25 to 27 days, respectively, to their ragweed pollen seasons; and parts of Minnesota and Wisconsin have added an extra couple of weeks.

The study is published in the journal Proceedings of the National Academy of Sciences, and it links extended pollen seasons with global warming and greenhouse gas emissions.