[added comments] While carbon dioxide is a “greenhouse” gas and it does absorb energy in some infrared wavelength bands, many scientists will argue that its affect on average global temperatures have been considerably exaggerated by the proponents of catastrophic anthropogenic global warming. In order to derive effects extreme enough to be considered catastrophic, they have had to rely on strong positive feedback resulting in much larger effects than CO2 could produce without any feedbacks. Many prestigious scientists disagree with that and some even suspect the feedback is not only much less than estimated, but may even be negative.
One must always consider that contrary to that which is frequently stated by climate activists/alarmists, the debate is never over in science.
[This article was originally published on June 29, 2020 by EnvironmentalProgress.org. We are reproducing it here under the fair use doctrine. It is a refreshingly honest presentation by Michael Shellenberger, an environmentalist who once accepted and actively promoted the idea that catastrophic anthropogenic global warming was occurring. After critically examining the AGW hypothesis, he has concluded that it is not supported by the facts, and consequently is apologizing for having participated in this misinformation campaign. Ed.]
Burnett: You coauthored a book titled Lukewarming: The New Climate Science that Changes Everything. What is the thesis of the book?
Michaels: Global warming is often presented as one of two alternative visions: left unattended, it will bring about an unmitigated disaster with tremendous consequences to humanity and the planet; or there is really “no such thing”—meaning little to no warming and little to no influence of human greenhouse-gas emissions on climate.
[This interview was originally published by the Heartland Institute on December 5th, 2019. It is being printed here with the permission of Dr. H. Sterling Burnett from the Heartland Institute.]