Forget Kermit’s famous lament, “It’s not easy being green.” It’s actually never been easier. What’s hard, though, is to stand out and make a big difference (like this naked biker — see our #3 choice). That takes more than recycling plastic bottles or signing petitions. It calls for extraordinary action. What follows are a few who’ve dared to do more — environmentalists who walk their eco-talk in bold, daring and creative ways. What remains is a lasting impression — and, hopefully, lasting change. (Text by Sidney Stevens)