“We could have saved [the Earth] but we were too damned cheap.”

“If flying-saucer creatures or angels or whatever were to come here in a hundred years, say, and find us gone like the dinosaurs, what might be a good message for humanity to leave for them, maybe carved in great big letters on a Grand Canyon wall? Here is this old poop's suggestion: WE PROBABLY COULD HAVE SAVED OURSELVES, BUT WERE TOO DAMNED LAZY TO TRY VERY HARD...”

“Earth Day was created because we were doing a lot of drugs, more drugs than you could ever f@*! imagine. And so we came up with Earth Day, so we'd have one day that would remind us what planet we were living on.”

“People were so cheap there... they ate beans to save on bubble bath.”

“I hate to be obvious," added the Scarecrow, "but you'd have saved yourself a heap of trouble if you weren't too cheap to invest in a leash, Dorothy.”

“What Darwin was too polite to say, my friends, is that we came to rule the earth not because we were the smartest, or even the meanest, but because we have always been the craziest, most murderous motherfuckers in the jungle.”