Research aimed at disputing the scientific consensus on global warming is part of a huge public misinformation campaign funded by some of the world's largest carbon polluters, former Vice President Al Gore said Tuesday…Gore likened the campaign to the millions of dollars spent by U.S. tobacco companies years ago on creating the appearance of scientific debate on smoking's harmful effects...He said ExxonMobil Corp...is one of the major fuel companies involved in trying to mislead the public about global warming. ExxonMobil said the allegation was ``completely false.''