gets down close to the ground? >> well, this very small particle-like stuff, this dust, can get in the periphery, the very outer edges of your lungs and can actually stay there. and some of this ash is made of sillca. if you ever make grout and you pour the grout in the bucket and you put the water in, they say do not breathe this stuff, because it's sillca. it can lead to sill coastis, a long disease, and eventually lead to lung cancer. this is spreading around the earth now, and not in big particles like you would think of a black lung coal miner, like my grandfather, that spend hours in the coal mine after they broke out all the coal, and breathing that n but just enough. how many times do you have to breathe a day? you're breathing in pieces and pieces and some places are flying in canada and newfoundland. what we had over the past couple of days, is a very large eruption. it went up 40,000, 50,000 feet