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34 votes
Write the merits and demerits of ultraviolet rays​

User Ivan Fretes
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20 votes
Excessive sun exposure is associated with several health risks including the acceleration of skin aging and the promotion of skin cancers, such as basal cell carcinoma, squamous cell carcinoma, and malignant melanoma. However, several health benefits of UV exposure include vitamin D production and improved mood.
User Colin Burnett
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