Guardian: Alfredo Brillembourg is enthusing about Zurich's blue recycling bags. "They are an incredible thing," he says, his accent revealing his Venezuelan roots. The architect and former Columbia University professor talks at a breathless pace, most sentences ending in exclamation marks. "Zurich is an incredible city for recycling! Not only that but they figured out how to finance the whole thing, everyone is obliged to throw their garbage out in one type of bag, the Zuri-bag. That bag is more expensive...