Toronto-based socially responsible investing (SRI) research firm Jantzi Research recently released a report entitled Oil and Gas in a Bull Market: The Shifting Sands of Responsibility that rates and ranks 23 oil and gas companies on their social and environmental performance. UK-based BP topped the list...with second through fourth places going to Canada-based Suncor Energy, Nexen and Petro-Canada respectively, and UK-based Shell rounding out the top five...Chevron ranks the highest of the US-based companies...followed by Burlington Resources [part of ConocoPhilips]...Marathon Oil...and ExxonMobil...