"Greenwich Taxpayer" sent along this wonderful, brilliant commentary by the late and lamented George Carlin on "Saving the Planet". Probably because my minor in college was geology, I've long had an appreciation of exactly how insignificant our temporary visit on earth has been, and will be, but Carlin says what I've long preached, and so much better than I. In fact, my own thoughts on the subject are even tinier compared to Carlin's than are the 200,000 years of human existence vs the 4.5 billion years our planet's been around.
The entire 8 minutes of this video are very much worth watching, but if you're pressed for time, Carlin's discussion of plastic bags begins three minutes in.
But really: watch the whole thing.