That is an incredible job, Barry ... thank you for doing this!
I don't want to get into the "what causes ALS" debate, and I realize we forum members are only a very small selection of PALS, but looking at the map, the "patternlessness" of sporatic ALS does make you think there must be some genetic glitch. That and the fact that familial ALS exists.
But obviously there's something environmental too, because there are clusters, too. (I don't mean on the map, I mean Guam, etc.) Boy, I would love to know the cause! It wouldn't change the outcome for me, but at least I'd know who to sue!