From the Globe and Mail:
Canadian scientist Don MacIver resigned yesterday as chair of the working group organizing the next World Climate Congress after the federal government revoked his permission to speak at an event in Poznan, Poland, where United Nations climate-change negotiations are being held.
One of Canada's leading climate-change experts, Gordon McBean, called this an indication of the Conservative government's policy of ignoring the real effects of greenhouse-gas emissions and supporting the development of heavily polluting fossil fuels, especially the Alberta oil sands.
"Unfortunately, the weight of the tar sands lobby is such that the federal government is not capable at this point to show the leadership that we need," Dr. McBean said. "In Environment Canada there are a lot of outstanding people. But I'm not sure that as a department it is functioning in a way that is conducive to providing the kind of leadership that we need."