These are the CASSE blog articles on climate change.


Two Degrees: Guardrail? Or Guide Rail to Disaster?

by Kent Peacock

The idea that 2⁰C is a safe guardrail against global heating was a guesstimate by an economist almost fifty years ago, and it had a sketchy scientific basis even at that time. In November 2023, a consortium comprised of many of the top glaciologists and climate scientists in the world published a report entitled “The State of the Cryosphere 2023—Two Degrees is Too High.” (See also the review on Carbon Brief.)  The only hope of preventing catastrophic sea-level rise,


We Asked for Science. We Got Sustain-a-Babble.

Editor’s Note

CASSE encourages members and readers to hold their government agencies to account on the conflict between economic growth and environmental protection. Last week, Brian Czech presented Gag-Ordered No More to the Canadian Association for the Club of Rome, concluding with recommendations for engaging agency directors. We follow up this week with a letter from the Qualicum Institute (British Columbia) to Canada’s Minister of Environment and Climate Change,


Climate Engineering: Doubling Down on Bad Habits

by Gary Gardner

Social psychologists tell us it takes about 66 days to form a new habit. In my experience that’s only half true. Sixty-six days to form a good habit, yes, but about 66 hours to form a bad one. If I reach for a donut at breakfast, then do the same the next two days, I seal the deal and establish a habit of bad eating.


A New Papal Statement Hits—and Misses—the Mark

by Gary Gardner

Religious groups have long been players in movements to create a better world, from the anti-apartheid and civil rights movements to initiatives on arms reduction, debt forgiveness, and divestment from fossil fuels. It makes sense that they are involved in the sustainability movement as well. Sustainability, including the effort to create a steady state economy, requires a shift in one’s worldview and values,


Three Telling Takeaways from Climate Week in New York City

by Daniel Wortel-London

New York City was busier than usual last week.

The occasion was Climate Week, a host of events devoted to charting and increasing environmental progress. Hundreds of sold-out summits, covering everything from biodiversity to energy, could be found across the metropolis. And within those halls, would-be thought leaders discussed the challenges of sustainability with both earnestness and self-congratulation.

There was a tension,


Suing for the Steady State

by Daniel Wortel-London

On August 14, Montana’s Supreme Court ruled that in light of Montanans’ constitutional right to a clean environment, the failure of state agencies to take climate change into account when considering new projects is illegal. This ruling, resulting from a lawsuit by 16 young people, is being followed up by a similar trial in Oregon—and another is pending in Hawaii. At a moment of legislative disappointment across the sustainability policy landscape,


A “Final Warning” on Climate

by Gary Gardner

Last week the Intergovernmental Panel on Climate Change (IPCC) issued what Greenpeace International called the “final warning” in the global effort to limit warming to 1.5 degrees Celsius (2.7° Fahrenheit) above preindustrial levels. After three decades of increasingly insistent wake-up calls, the Panel laid out the sobering reality: Meeting the temperature goal set by the global community in 2015 is impossible without an immediate response, “a quantum leap in climate action,” in the words of United Nations Secretary General Antonio Guterres.


Degrowth in a Green-Growth World

by Rosalie Bull

I’m having an ongoing conversation with a friend about the merits and drawbacks of degrowth as a climate action strategy. She is easily the most astute climate thinker I know, with insights available only to those deeply immersed in the nuances of climate finance and decarbonization. She’s wary of the degrowth movement, as are many prominent players in the climate transition. She views it as an unhelpful distraction from humanity’s efforts to grapple with the climate crisis.


COP15: The Good, the Bad, and the Smugly

by Brian Czech

On a scale of one to ten, COP15—the UN Biodiversity Conference in Montreal last month—was a solid five. That may not sound like a ringing endorsement, but it represents significant progress from prior COPs, which dabbled along in the one or two range for the better part of three decades. The progress was evident from the start, when UN Secretary General António Guterres kicked off the conference by noting,


Hurricane Ian: A Profoundly Polluting Event

by Brian Czech

If you’re a steady stater, I know what you’re thinking about Hurricane Ian. For starters, of course, you’re deeply concerned about any family or friends you may have in Florida, along with folks in general along Ian’s path. But you’re also wondering, “What about the pollution?”

The marine pollution that accompanies coastal flooding, most notably from violent hurricanes, is probably ignored by the majority of folks,