The National Film Board of Canada presents ; a film by Teresa MacInnes and Kent Nason ; directed by Teresa MacInnes and Kent Nason ; written by Teresa MacInnes ; producer, Annette Clarke
Edward Burtynsky ; Mercury Films, Foundry Films present ; in co-production with the National Film Board of Canada, and in association with TVOntario ; director, Jennifer Baichwal ; produced by Nick de Pencier, Daniel Iron, Jennifer Baichwal