I happened to watch a video on YouTube recently. It is a stand-up comedy by George Carlin in which he digs on environmentalists (http://www.youtube.com/watch?v=eScDfYzMEEw). There is a part in the video where he raps “Our planet’s been through a lot worse than us. it’s been through Volcanoes, Earthquakes, plate tectonics, continental drifts, solar flares, sun spots, magnetic storms, the magnetic reversal of the poles, hundreds of thousands of years of bombardment by comets and asteroids and meteors, worldwide floods, tidal waves, worldwide fires, erosion, cosmic waves, recurring ice ages and we think…..some plastic bags” well, sure I was laughing, not at the uncertainty as it is intended but the irony. Plastics can alter our environment in future not far less than the entire geographical and astronomical phenomenon he has mentioned, considering the massive scale it’s been produced.