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You may be vigilant with the sunscreen, but here's the bad news: UV radiation alters the actual DNA of your skin cells, causing lines, wrinkles, discoloration, and even cancer. Here's a ray of (UV-free) light: You can reverse sun damage.

Dear EarthTalk : Isn’t spray sunscreen a health and environmental nightmare when it seems that more of the sunscreen ends up going up my nose than on the kid at the beach next to me? --Lillian Robertson, Methuen, Mass. Spray cans of sunscreen may no longer contain chlorofluorocarbons (also known as CFCs, which were phased out in the 1990s for causing holes in the stratospheric ozone layer), but many contain other chemicals that are not good for our health or the environment.