Geologist Gregory Wrightstone: '300-Year Warming Trend Began Naturally—CO2 Didn't Drive It'

Geologist Gregory Wrightstone: "We're in a long-term warming trend [that] started more than 300 years ago... The first 250 years of this warming had to have been naturally driven."

"Just as we started increasing CO2 in the atmosphere [between 1944 and 1976], we went into a 33-year cooling trend. How do you explain that? If CO2 is going to drive temperatures, why—for 33 years—did we experience a cooling?"