Canada must consider how Alberta’s oilsands contribute to global climate change and make moves to cut its carbon emissions before it's too late, South African Archbishop Desmond Tutu told reporters in Fort McMurray. “Only those who don’t want to listen, only those who want to be blind can’t see that we are sitting on a powderkeg,” he said Friday. “If we don’t do something urgently, quickly, we won’t have a world.” Tutu is in the northern Alberta city for a two-day conference on oilsands development and aboriginal treaties, was hosted by the Athabasca Chipewyan First Nation.