Indoor and Outdoor Hazards If youâre already taking measures to protect skin while outdoors, thatâs great. The sun is responsible for up to 90% of visible skin changes commonly attributed to aging, according to the Environmental Protection Agency. But you donât have to be at the pool or beach to be susceptible to sun damage. Whether youâre driving your car or youâre inside your home, itâs important to keep in mind that your skin can be exposed to free radicals from the sunâs rays through windows. Whatâs more, blue light from digital screens -- ubiquitous these days -- can also be harmful to skin. Additionally, damaging free radicals can be generated by pollution, certain foods, like those with a high glycemic index and red meat, exercise, alcohol and more.