Print Liberation is at it again (it being making cool shirts). The design isn’t complex at all, it’s just simple elements combined excellently to make a quality shirt.
I also like it because it’s not super in your face, as some “green” shirts can be. It’s a good design first, and a political message second (at least in my interpretation).
You can pick this design up for $22.00 at Print Liberation. Unsurprisingly, it’s printed on organic shirts.