I recently read about a new Swiss study claiming that the ingredient titanium dioxide (TiO2) nanoparticles -- widely used as a white pigment in sunscreen, toothpaste and cosmetics -- provokes similar inflammatory effects on the lungs as asbestos. Yes, that asbestos. The stuff that can cause serious illnesses, "including malignant lung cancer, mesothelioma (a formerly rare cancer strongly associated with exposure to amphibole asbestos), and asbestosis (a type of pneumoconiosis)."
So, I hardly ever use sunscreen even though I know all about the dangers of skin cancer. The laziness that makes me "green" by default because I can't be bothered to put makeup on my face or use other girlie skin products is the same laziness that results in way too much unprotected sun exposure than this white girl should be allowed.