Specifically, oak pollen. Even if I weren’t allergic, it’s disgusting and it gets everywhere. Every morning and at the end of every workday, when I get in my car the windshield is spattered all over with little green powder-blobs of treejizz (and I don’t even park under a tree). Happens every year at this time.
If I’m ever Mayor of Tampa, I will find a way to have every oak tree in town pulled up by the roots and sold to a paper mill. (Why not, we’ll still have plenty of trees.)