Breitbart News Network is an American far-right syndicated news, opinion, and commentary website founded in mid-2007 by American conservative commentator Andrew Breitbart. Its content has been described as misogynistic, xenophobic, and racist by academics and journalists. The site has published a number of conspiracy theories and intentionally misleading stories. Posts originating from the Breitbart News Facebook page are among the most widely shared political content on Facebook.

Climate change denial is a form of science denial characterized by rejecting, refusing to acknowledge, disputing, or fighting the scientific consensus on climate change. Those promoting denial commonly use rhetorical tactics to give the appearance of a scientific controversy where there is none. Climate change denial includes unreasonable doubts about the extent to which climate change is caused by humans, its effects on nature and human society, and the potential of adaptation to global warming by human actions. To a lesser extent, climate change denial can also be implicit when people accept the science but fail to reconcile it with their belief or action. Several studies have analyzed these positions as forms of denialism, pseudoscience, or propaganda.