Rain clears pollen from the air, right? Well, this new research will make you think twice.

Everyone with seasonal allergies is familiar with how troublesome pollen grains can be, but new research from the University of Iowa unveils just how insidious fragmented pollen can be. Since pollen grains can break up in high humidity, during storms they are swept up into the storm’s updraft and ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video