Appearing on CNBC's «Squawk Box» on June 19, Perry was asked by anchor Joe Kernen, «do you believe CO2 is primary control knob for the temperature of the Earth and for climate?» (dailycaller.com)
«No, most likely the primary control knob is the ocean waters and this environment that we live in,» he told CNBC. (vox.com)
Asked in a CNBC interview in June if he accepted that carbon dioxide was «the primary control knob for the temperature of the Earth and for climate,» Perry said: (climatesciencewatch.org)