Every year, this tree 2 yards over grows, and then blows all this cotton crap all over our yard. For 2-5 days it looks like it is snowing, in the Summer. We had to pull food off the grill, this afternoon because of it, and we "swam" the day before, thankfully, because it covers everything!
On a not so wise note, it's also flammable. It curls up in little cotton ball bunches in corners & it may or may not be a quick flash of fire that quickly (and safely) burns out before your eyes. I don't recommend doing this,of course. I'm just saying.