SUMMARY
This letter presenting a short list of claims about climate change boasts a list of “500 scientists and professionals” who have co-signed it.
The claims contradict or misrepresent the evidence uncovered by geoscientists, failing to provide support for its conclusions downplaying the threat of climate change. The letter claims, for example, that climate models ignore the benefits of increased CO2 on plant growth. This is false, as many climate models simulate the response of vegetation to increased CO2—and the climate change it causes.
And while some outlets described the co-signers as experts in climate science, most are not. As noted in an analysis below, a significant portion of the co-signers are either engineers or professionals in non-technical fields. Only 10 identified themselves as climate scientists.
Similar letters have sought to establish credibility with large numbers of co-signers in the past, but evidence is what counts in science.
The Propaganda Playbook 