Two weeks ago, Guardian columnist George Monbiot described how the Bivings Group, a PR company contracted to Monsanto, invented fake citizens to post messages on internet listservers. "These phantoms had launched a campaign to force Nature magazine to retract a paper it had published, alleging that native corn in Mexico had been contaminated with GM pollen," Monbiot writes in today's column. "But this, it now seems, is just one of hundreds of critical interventions with which PR companies hired by big business have secretly guided the biotech debate over the past few years. ...