You could be wearing hemp shoes, pants made from recycled trash bags, held up by a belt made from old tires, and a top made of air (!) and more than likely your timepiece will still keep you from being the most green guy on the block. But not if you're wearing one of these Sprout Watches ($20-$80). Aiming to be the most eco-friendly watches available, they offer features like 99% biodegradable corn resin cases, certified conflict-free diamonds, organic cotton straps, bamboo dials, mineral crystal lenses, mercury-free batteries, and recycled/recyclable packaging. Anything greener would be a sundial.