Skin cancer is a serious consequence but there's a more serious aspect of it is... that the ultraviolet light attacks the little one-celled plants that are at the base of the food chain those are the guys that the next guys eat and the next guys eat and the next guys, next guys and way at the top of the ecological pyramid there's us. we're ultimately eating the one-celled plants that have been processed through lots of intermediate plants and animals and it's, it's clear that very thin atmosphere, it's so sensitive to the depredations of human beings you look at that and you say 'hey that's only one little world'