Pollen seasons across North America are getting worse, and the data backs it up. A major study found that between 1990 and 2018, pollen seasons lengthened by about 20 days, while pollen concentrations rose by roughly 21%. Warmer temperatures extend the growing season, and higher carbon dioxide levels cause plants like ragweed to grow faster and produce more pollen. That means allergy symptoms start earlier, last longer, and feel more intense for millions of people. For anyone tracking climate impacts, this is a clear public health signal tied directly to greenhouse gas emissions. The same CO2 driving warming is also driving the pollen problem. While the article offers practical tips like checking forecasts and keeping windows closed, the underlying fix is reducing emissions. Understanding the link between carbon pollution and seasonal allergies makes it easier to see why cutting fossil fuels matters beyond temperature targets.
