The destruction of the Earth's ozone layer by industrial chemicals is a valid concern because?

Question

a- animals will not have air to breathe.
d- ultraviolet light damages DNA.
c- we will be unable to get suntans.
d- none of the above

Answer 1

b

Lets look at why based on facts you probably know.

If you are in grade school (or even younger), it should have been pounded into your head by now that you should wear sunscreen. If you were like me, you probably cared less.

You should also probably be aware of the link between sun tanning and skin cancer (the reason why you should wear sunscreen). Cancer is caused by cells that have mutated for some reason. The most common reason is due to damage of the DNA structure in a cell (reasons can be chemicals like from cigarettes, radiation like from X-rays, or in this case UV light from the sun or human sources like sun tanning lamps)

UV light damages DNA. The suntan you get is your bodies way of trying to prevent the UV light from damaging DNA. Sunscreen contains UV filters to further prevent UV rays from hitting your body (just as a fact to throw in for no reason, some sun screens are beginning to use what is called nanotechnology, the concept of a human built thing that is small enough to be passed through the cellular membrane. Nanotechnology is somewhat controversial as the long term effects of it are unknown. Some people cite the use of nanotechnology in a pond of bass caused the fish to develop tumors in their bodies. I haven't verified these facts, I was just told this in a conversation by a biologist once)

Answer 2

a- animals will not have air to breathe. (umm no it won't)
d- ultraviolet light damages DNA.
c- we will be unable to get suntans. (you'll get more of a suntan without the ozone lair)
d- none of the above (no)

yep it's B "There is much greater probability of DNA damage by UV radiation at various wavelengths. Fortunately, where DNA is easily damaged, such as by wavelengths shorter than 290 nm, ozone strongly absorbs UV. At the longer wavelengths where ozone absorbs weakly, DNA damage is less likely."

Answer 3

b-UV light damages DNA. The ozone layer absorbs most UV radiation before it enters the surface.