Armstrong Economics: In your view will the next decade be a minor cold blip or “OMG we’re all going to freeze to death and run out of food ?” The answer is yes, we may be facing below normal temperatures leading to food shortages, health issues, and more unrest! The worst may come during the 2020-2024 period.

Howard Cork Hayden, physicist, Scott Denning, atmospheric scientist: A lot has been written about the need for public debate between alarmists and skeptics on the science of climate change. On December 2, 2017, there was an actual debate, at the Colorado State University, Pueblo, Colorado. The slides are available online and they tell a remarkable story about the emptiness of alarmism.

Sebastian Luening, paleogeologist: Michel de Rougemont chemical engineer: Without questioning the observed global warming or the emissions to the atmosphere of infrared-absorbing gases, three central issues remain without properly quantified responses, without which no other climate policy than that of a gradual adaptation can be justified: the sensitivity of the climate to human contributions, the disadvantages and the benefits for mankind resulting from a generally warmer climate, and the foreseeable evolution of the climate in consequence of unpredictable changes in human activity.

Rubert Darwall, strategy consultant and policy analyst. He read economics and history at Cambridge University, Judith Curry, former Professor and Chair of the School of Earth and Atmospheric Sciences at the Georgia Institute of Technology: How dependable is climate science? Global warming mitigation policies depend on the credibility and integrity of climate science. In turn, that depends on a deterministic model of the climate system in which it is possible to quantify the role of carbon dioxide (CO2) with a high degree of confidence. This essay explores the contrast between scientists’ expressions of public confidence and private admissions of uncertainty on critical aspects of the science that undergirds the consensus.