A public interest watchdog group that focuses on ensuring truth and transparency in America's food system, is calling on a noted corporate Big Food and GMO defender to publicly reveal any sources of funding he receives. U.S. Right To Know , in a recent press release , said that Jon Entine , a top chemical industry PR operative who has churned out scores of articles in defense of various corporate interests, attacked the Columbia School of Journalism in a March 1 New York Post column, claiming it "smeared Exxon," engaged in "advocacy journalism," and hired "an activist" to run the school.