Speaking of the intersection of art and the environment, see the above. It may be a fine example of pointillism, but here is a version that is made out of (trumpet fanfare) aluminum cans! It’s an amazing exhibit that calls to attention the amount of resources (as well as political points) we use in the US. Chris Jordan makes some amazing pictures that get more amazing as you see the detail.
And here is my own simplistic artwork, a little pattern I made on ArtRage.