Guardian: Shell, BP and other oil companies at the centre of the tar sands revolution in Canada are facing a backlash from the Co-operative and other members of the ethical investment community determined to bring a halt to these operations for environmental reasons. A joint report from Co-operative Investments and the wildlife charity WWF released today will be followed up in September by a meeting of the UK Social Investment Forum (UKSIF) to press for an end to this carbon-intensive …