Vienna’s Schönbrunn Zoo is trashed: a toxic waste barrel on the aquarium reef, a car wreck in the rhino’s watering hole, an oil pump in the penguin pen, and old bathtubs and signs dumped in the crocodile lagoon. These were just some of the installations created by artists Christoph Steinbrener and Rainer Dempft for “Trouble in Paradise,” a new project commenting on “the troubled relationship of nature and civilization” from within the idyllic manmade animal enclosures. The installation is on view through October 18th after which the garbage gets cleaned up.