Environment Canada's top official told the main Canadian oil and gas lobby group that the government needed more information about unidentified fluids involved in the hydraulic fracturing process. Paul Boothe, the former deputy minister, wrote that a voluntary industry disclosure program was a positive step toward improving environmental performance, but he also suggested that it was not enough to satisfy the environment department. "Environment Canada would like to work with your organization and others to ensure that the voluntary disclosure is structured so that we can determine the environmental impact of these substances," he wrote. "To further inform this work, information such as all chemical additives used, their volumes, and their storage and disposal methods would be required." For the full story, see http://www.ottawacitizen.com/technology/environment/Environment+Canada+asks+industry+come+clean/8228375/story.html.