Vulcan's Septic Tank

Officials in Auckland, New Zealand, have approved a $25 million, 30-year plan to deposit hundreds of thousands of tons of biosolids — cleaned, treated and dried human waste — into an extinct volcano on nearby Puketutu Island. The material may be used to rebuild the island's volcanic cone, which has been largely destroyed by quarrying. At the end of 30 years, there are even plans to cap the volcanic dump and turn it into — what else — a public park.

According to vulcanologist Ian Smith, the nature of volcanic activity in the region means the Puketutu Island is unlikely to erupt again. “I think it is pretty safe,” says Smith.

If that prediction proves overly optimistic, Auckland officials say they plan to cut their losses by depositing the giant flaming island of crap on Australia's doorstep and running away.