[Right Wing Professor]

So people who religiously apply sunscreen, or live exclusively indoors, can be expected to live 900 years?

Nope. It doesn't work even a fraction as well.

You have it backwards. Water and ice don't absorb ultraviolet radiation at all, except in the 'vacuum UV' region where oxygen and nitrogen block it as well. On the other hand, your SPF 45 absorbs virtually all of it.

Said canopy would have also increased atmospheric pressure.

How did it stay up there?

[f.Christian]

plankton iq cretin placemaker !

[Terriergal]

How do ice crystals normally stay up there?

[Terriergal]

OH I see what you're saying. If you had a solid canopy of ice, with full integrity, it would function as a bubble would it not? Until something like, say an asteroid, compromised it.

[Terriergal]

Water and ice don't absorb ultraviolet radiation at all, except in the 'vacuum UV' region where oxygen and nitrogen block it as well. On the other hand, your SPF 45 absorbs virtually all of it.

So there aren't any harmful rays that water would block from the sun in that 80 (?) percent of the sun's energy that it reflects?

Trying to figure out how I can get sunburned from the reflection off the snow and water if it doesn't reflect those things.