Trash to ethanol: Edmonton's long-delayed Enerkem plant explained

It sounds like science fiction — a machine that gobbles up trash and spits out an ethanol so clean it can speed a car down the highway. 
This is the dream Edmonton officials have been selling for nearly a decade, even as other parts of the city’s waste management plan fell behind: the recycling facility aged, the composter roof rotted and old sewage lagoons sat untreated.
But it’s not just a dream, say Enerkem officials. It’s a careful, step-by-step world first accom