The 2000 Summer Olympics in Sydney, Australia, which will begin on Sept. 15, are expected to be the greenest ever. Most of the events will take place in Homebush Bay, once the polluted site of a slaughterhouse but now transformed by a big environmental cleanup. The Olympic Village, where 15,000 athletes and officials will live during the games, is being called the world’s largest solar-powered suburb. Food waste generated during the games will be composted by worms, and extensive recycling plans are in place. (Of course, some critics charge that all Olympic Games are an extravagant waste of resources, but we’ll leave that for another article.)