Incidence of both non-melanoma and melanoma skin cancers has been increasing over the past decades. Key causes include depletion of the ozone layer, and recreational overexposure of people to sun (UV radiation). Currently, between 2 and 3 million non-melanoma skin cancers and 132,000 melanoma skin cancers occur globally each year. One in every three cancers diagnosed is a skin cancer. According to Skin Cancer Foundation Statistics, one in every five Americans develops skin cancer in his/her lifetime.
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