The previous post cited G.E. as the source of a great idea, but a magazine article I read afterward put a real buzz-kill on that, noting how G.E. is the scourge of the Hudson, pouring millions of gallons of PCB's in the river since forever ago.
Anyway, more ideas about killing ideas appear in the graphic to the left. Which is your favorite? (Don't get any ideas).
The drawings are from Doobybrain.com, who got them from somewhere else.