The dean at the journalism school at Columbia University defended the integrity of reporters investigating what Exxon Mobil scientists knew about climate change. Journalism graduate students at Columbia started their investigation into Exxon records in early 2014 and then coordinated with the Los Angeles Times . In October, the newspaper wrote Exxon “publicly cast doubt” on the existence of global warming after years of leading climate research. The debate caught the attention of the New York Attorney General’s office, which issued a subpoena to Exxon seeking clarity on the issue. In November, Exxon turned its attention to Columbia, however, questioning the effectiveness of the research. Steve Coll, dean of the […]