There is not a legitimate scientific controversy, perhaps, but there is still a controversy. Even if (as appears to be the case) the vast majority of global warming contrarians (Michaels, Lindzen, et al.) and contrarian organizations (the Cato Institute, JunkScience.com, et al.) are contrarian BECAUSE of ties to the fossil fuels industry, the high-profile nature of this controversy (just think of Al Gore's movie and its detractors, John Stossel, etc.) means that it is still important that Wikipedia users have solid information about iteven though no respectable climate scientists see it as a specifically scientific controversy.