Perhaps you consider yourself an environmentalist. Do you talk to your friends and relatives about how important it is to recycle? Do you bring a reusable bag with you to the grocery store? Maybe you avoid avid consumerism and get books (including this one) only out of the library rather than buying them at the bookstore. Or perhaps you keep your thermostat low in the winter for more than money-saving reasons. If so, you might also be interested in making a positive environmental impact through your investment decisions, too.