Sun Media: Green crusader David Suzuki took a swipe at Calgary’s environmental record yesterday, slamming the city as an ecological disaster. In attendance at the Canadian Urban Forest Conference in Sherwood Park, the broadcaster-turned-activist took aim at Calgary when asked by reporters how Alberta compares to other provinces when it comes to dealing with climate change. “Calgary is an ecological disaster — the urban sprawl there is crazy,” he said, training his sights on …