The Riff: Got worms?

Last weekend's Living Green Expo offered more than just a guilt trip and a few one-liners.

".... In other poop news, one of the biggest attractions at the expo was the dual flush toilet set up on a pedestal by Minneapolis store Natural Built Home, with a sign that read, "Flush Me." You would've thought people were getting their free giant slot-machine pull at Caesar's Palace, judging by how many stood there waiting and watching the miracle of low-flow plumbing......"