Final answer:
Sunbathers and tanning parlor patrons are both at risk of sunburn and skin cancer due to overexposure to UV radiation, which can lead to serious health issues.
Step-by-step explanation:
Two potential problems that are just as likely to occur among patrons of tanning parlors as they are among sunbathers on a beach are sunburn and skin cancer. Both are related to overexposure to ultraviolet (UV) radiation. When skin is exposed to high levels of UV-B and UV-C radiation, either from direct sunlight or from the artificial lights in tanning beds, it can lead to sunburn. Moreover, a tan is a sign that some level of skin damage has already occurred, as it is a defense mechanism where the body produces pigments to protect living cells from UV exposure. Prolonged exposure to UV light, which has been classified by the World Health Organization as a Group 1 carcinogen, increases the risk of cell damage and can induce skin cancer, with a higher risk for individuals who have had blistering sunburns during their youth.