Data: Climate Central; Note: Map shows data for the two largest cities in each state, where available; Map: Axios Visuals
Allergy season is 24 days longer, on average, in Salt Lake City than it was in 1970, per a new Climate Central analysis.
By the numbers: In nearly 90% of 198 U.S. cities analyzed, freeze-free growingseasons lengthened by an average of 21 days.
That's the timebetween the last and first freeze, used here to represent allergy season.
What they're saying: "A longer allergy season is nothing to sneeze at — it's a clear signal of a warming world, driven by carbon pollution," Kristy Dahl, the organization's vice president for science, wrote in a statement.