I'm talking about outerspace...
while I don't know much about nuclear waste's actual "anatomy", shooting it off into outerspace is a way of getting rid of its danger via its radiation. If it has chemical dangers like corresiveness... meh... it could come back to earth, but would it be much different from the acid rain that we already have falling back to earth anyways or ash from volcanos or other poisonous gases from man, volcanoes, or underground (google the Lake of Death, or just click here: http://www.time.com/time/magazine/ar...962228,00.html or http://en.wikipedia.org/wiki/Lake_Nyos ) ?
our nuclear waste's radation in outerspace would feel right at home, with the sun, and all the other stars, and/or various sources of energy (energy=radiation).
Also, in terms of physical debris... we've already got a crowded belt of it around the earth with all of our space shuttle stuff and/or satelittes. And, that's not even mentioning about all the debris that is out in outerspace which crashes to earth contantly (most of it is burnt up upon entry thanks to our atmosphere-friction).
the atmosphere mainly only protects us from sunlight (via clouds), but the "real dangerous" radiation (x-rays, gamma rays, and background radiation) is blocked by the ozone and van allen radiation belts (via the magnetic fields) - with the north and south "lights" (northern and southern lights, aurora bolialis and whatever the other is called - too lazy to look it up lol) as the trash bin, hehe.
Also, UV light (ultra violet radiation) from the sun GOES RIGHT THROUGH THE ATMOSPHERE (CLOUDS), you need your sunscreen on yourself on a cloudy overcast cold day just as much as you do when there's no clouds and the big hot sun is blazing down on you. UV radation causes cancer (mainly skin cancer, or if lucky you just get "sun-burned" instead).