About two and a half years ago.
On February 27th, 2007. See this statement in context.
On February 27th, 2007. See this statement in context.
February 27th, 2007 / 9:50 a.m.
Canada Research Chair in Energy and the Environment, Department of Chemical and Petroleum Engineering and Department of Economics, Institute for Sustainable Energy, Environment and Economy, University of Calgary
About two and a half years ago.
See context to find out what was said next.