Pollen Concentration Up By More Than 21% Since 1990

Think there's more pollen now than 30 years ago. You're right.

Video Transcript

- Well, if you're feeling like the allergy season is worse than usual, you're not alone. Experts say climate change is making humans' respiratory health worse and is increasing pollen levels in North America. Pollen concentrations have jumped by more than 21% since 1990. And allergy season is 20 days longer.