It's hard enough to remember to put on sunscreen when you leave the house, but now you also need to make sure your sunscreen is safe to use. The Environmental Working Group has just released its 2012 Sunscreen Guide, and in order to make the list, a sunscreen must be free of oxybenzone and retinyl palmitate, not have an SPF above 50, and must be broad spectrum (protects against both UVA and UVB rays).