Subject: Science Fair Question

I'm doing a science fair project on the effects of 
ultraviolet rays on the human skin.  My topic has not yet 
been defined because of the limited amount of information 
that I have found.  I'm interested in whether or not UV 
rays cause cancer. If so, what is the amount of exposure 
that causes damage?  Or the effects of UV rays on your 
complexion. Do UV rays cause more or less acne?  If you 
have any info on any of the topics I have discussed please 
write me.  If my topics are too broad or not applicable 
please write me with any suggestions you may have. Thank you 
for your time. I appreciate the help.

Re:Science Fair Question