DFW: a.k.a. "Island of Pollen"

Those of us who suffer mightily from seasonal ragweed allergies are today (10.23.2005) taunted by this map of the United States showing pollen levels in the air...
View image

This is just wrong. In a universe run by Me, the red blobs would be centered on San Francisco, Berkley and Malibu, California; Madison, Wisconson; and Michael Moore's house.