I am an Engineer and a melanoma Patient. While I do not believe that all incidents of melanoma are caused by sunlight, the empirical evidence strongly links a huge number of the melanoma occurrences to the abuse of sunlight/tanning beds. Why is melanoma the leading cause of cancer deaths in young females? It used to be considered an old folks disease. Why is lung cancer a major problem in smokers? Something is definitely there as a catalyst to set off the mutations that result in cancer tumors. I have urged my daughters not to use Tanning beds. The one that has, often gets a burn from them. There definitely needs to be much tighter regulations and warnings about the dangers, especially restrictions on teenage utilization.