Humans in the Biosphere. Biology.?

A big thing about the thinning of the ozone layer, is that certain types of uv rays are currently being blocked by it. When it thins, these uv rays can get through (i don't remeber the specific types, but have names such as beta, and alpha) and these uv rays breakdown cells rather easily, as well as dna within cells upon contact. Our bodies can't protect on their own against these rays, so the ozone layer does so for us. The ozone layer thinning is a different concept from greenhouse ges.