The Committee for Skeptical Inquiry letter inspired a petition by climatetruth.org in which signers were asked to 'Tell the Associated Press: Establish a rule in the AP StyleBook ruling out the use of "skeptic" to describe those who deny scientific facts.' On 22 September 2015, the Associated Press announced "an addition to "AP Stylebook" entry on global warming" which advised, "to describe those who don’t accept climate science or dispute the world is warming from man-made forces, use climate change doubters or those who reject mainstream climate science. Avoid use of skeptics or deniers." On 17 May 2019, The Guardian also rejected use of the term "climate skeptic" in favor of "climate science denier".