Eco-friendly fashion tends to bring to mind images of burlap sacks, hemp necklaces and Birkenstocks. But today's environmentally thoughtful designers are nothing if not fashion-forward. Going green has already been a huge theme at fashion weeks in both London and New York, and now we're bringing it straight to you. Meet seven of the hottest green designers, whose collections will make you so happy you'll actually want to hug a tree. Take a look.