45 years ago, Tasmania’s Lake Pedder, with its glorious pink quartz sand, was flooded to create hydro-electric power for the state. Conservationists are convinced it is a lost jewel in the crown of Australia’s natural environment. Almost from the moment of its inundation, there were calls to restore Lake Pedder it to its past glory. Experts say this is technically feasibly, and once again the idea being discussed. But is restoring Lake Pedder a utopian dream, or a realistic goal?