It is pretty tough stuff. I was just talking to a guy here at the driving range and he had to go home when hitting balls in the thick, ash-filled air became a little too much for him. He has breathing problems constantly, so today was too much for him. On the bright side, looking at the weather forecast it appears we'll get at least a little rain in the coming 3 days. Hopefully it will help. I don't want to teach golf lessons wearing a gas mask. ; )