Excessive exposure to sunlight can lead to aging and skin cancer.prevent sun damage by limiting exposure,using sunglasses,sunscreen and protective clothing.
He advised people with red hair and fair skin to take particular care to avoid sunburn and to protect their skin by avoiding the sun in the middle of the day, seeking shade and covering up with a T-shirt and sunglasses and using sunscreen of at least factor 15.
An online campaign calling for Mr. Chen's release began last fall in which hundreds of Internet users uploaded photos of themselves wearing sunglasses in imitation of the activist, some even using them as their profile photos on social-media sites.