AP BIOLOGY

Detailed explanation-1: -Exposure to UV radiation causes early aging of the skin and damage that can lead to skin cancer. People of all ages and skin tones should limit the amount of time they spend in the sun, especially between mid-morning and late afternoon, and avoid other sources of UV radiation, such as tanning beds.

Detailed explanation-2: -Anyone who spends considerable time in the sun may develop skin cancer, especially if the skin isn’t protected by sunscreen or clothing. Tanning, including exposure to tanning lamps and beds, also puts you at risk. A tan is your skin’s injury response to excessive UV radiation.

Detailed explanation-3: -Stay Safe in the Sun The majority of sun exposure occurs before age 18 and skin cancer can take 20 years or more to develop. Whether your sun bathing days are behind you or you still spend time pursuing the perfect tan, you should be concerned about skin cancer.

Detailed explanation-4: -UVB rays cause a much greater risk of skin cancer than UVA. But UVA rays cause aging, wrinkling, and loss of elasticity. UVA also increases the damaging effects of UVB, including skin cancer and cataracts.

Detailed explanation-5: -Recent surveys indicate that around one million new cases of skin cancer are diagnosed each year in the United States, about 70% of which result from repeated exposure of the skin to sunlight.