evidence: Factually Inaccurate: It is an unequivocal fact that Earth’s climate has warmed over the past century. Also, the conclusion that the human-caused increase of greenhouse gases is causing warming is supported by a wide range of empirical data. Human-caused global warming is not a theoretical, future prediction—it has already occurred. Warming of the atmosphere and oceans is extensively documented, and the role of increased greenhouse gases in this warming has been determined from multiple lines of evidence. Rush Limbaugh falsely claims there is no evidence of human-caused global warming by Scott Johnson, Climate Feedback, Apr 4, 2018