April is Earth Month, a great time to think about what you put on your body and how it affects you — and the earth, for that matter. You probably see ads just about everywhere you look promoting 100 percent natural this and organic that. There are many not-so-friendly ingredients you've probably heard listed time and time again, but do you have a good grasp on what they all mean? Take my quiz to find out. This topic may be a little gloomy, but it's always better to be safe than sorry, no?