Canada ’s biggest energy companies including Suncor Energy Inc. (SU) and Imperial Oil Ltd. (IMO) are trailing global peers in reporting environmental performance as scrutiny of the oil sands intensifies. The 10 largest Canadian oil and natural gas producers by market value scored an average 31.7 out of 100 on environmental-performance disclosures in 2011, the last year with information for all companies, according to data compiled by Bloomberg. The Environmental Disclosure Scores weigh information such as emissions, spills and water use. The Canadian scores lag behind those of some of their largest U.S. and European competitors, including 54.6 (XOM) for Irving, Texas-based Exxon Mobil Corp., the world’s biggest energy company, 48.8 (RDSA) for Europe’s No. 1 oil producer Royal Dutch Shell Plc, and 62 (BP/) for London-based BP Plc, which has taken a charge of $42.5 billion related to the 2010 Gulf of Mexico oil-spill disaster. Canadian oil-sands producers […]