The possibility of cooling the planet after exceeding a climate target may sound reassuring. But for families deciding where to live, communities protecting their water supplies, and governments planning infrastructure, a lower future temperature would not necessarily mean that earlier damage will disappear.
I believe preparing a new generation of researchers to understand that distinction should become a front-of-mind climate policy priority.
The United Nations Environment Programme’s September 2026 discussion of climate overshoot gives this challenge renewed urgency. Overshoot means exceeding a warming threshold before eventually returning to the present or even cooler.
That possibility deserves serious investigation. It should also prompt investment in the people who will study what happens along the way and how much will rebound along with temperature.
My concern is that the promise of an eventual return could encourage an incomplete understanding of recovery. A temperature target can help guide policy, but it cannot tell us everything about the condition of a coastline, the security of a food supply, or a community’s ability to return to current conditions.
The Intergovernmental Panel on Climate Change (IPCC) finds that overshoot brings additional risks, some involving many irreversible impacts and associated consequences, which will have increased in magnitude and duration. In practical terms, how hot the planet becomes and how long it stays that way both matter. An eventual decline would not make the intervening years inconsequential.
Cooling Will Not Undo Every Impact
Consider a coastal community weighing whether to reinforce its defenses or relocate essential services. Its leaders need more than a projection of the consequences of average global temperature growth through the century’s end.
They need to understand persistent local risks, the useful life of their investments, and the consequences of waiting. Research should help them compare those choices under different possible futures and plan accordingly.
That is why I see overshoot as a challenge spanning science, economics, and public policy. Physical scientists can investigate environmental changes. Economists can examine costs and the value of competing uses of limited resources.
Social scientists can explore how institutions and communities might respond. Bringing those perspectives together could make the resulting advice more useful to people facing difficult decisions.
Preparing For an Uncertain Future
Researchers entering these fields would not be starting from nothing. Climate assessments have already examined the risks of warming temperatures up to the current 1.5 degrees Celsius above the 1850-1900 average, and decades of work offer methods, observations, and experience on which to build.
The task, in my view, is to extend that foundation while asking more closely how societies might fare during continued warming, stabilization, and any subsequent cooling.
Those of us who have spent much of our careers studying climate risks have a responsibility here. We must encourage younger colleagues to join the team, but encouragement alone will not be sufficient.
I would like universities and research funders to provide sustained opportunities for early-career scientists, economists, and policy researchers to work together on this new set of questions.
There is, of course, a well-rehearsed objection that cannot be ignored. With pressing needs to reduce emissions and protect communities, why devote additional resources to studying such an uncertain future?
My answer is that useful research into what the future might bring would strengthen those efforts. It should help decision-makers identify which protections remain worthwhile across different outcomes and which potential outcomes deserve closer scrutiny.
Nor should studying overshoot become a reason to postpone emissions reductions. The IPCC concludes that limiting warming requires deep, rapid, and sustained reductions in greenhouse gas emissions. I see research into future risks as a way to underscore the urgency to accelerate abatement while communities prepare for changes they will not be able to avoid.
The research agenda should begin with practical questions. Which decisions become harder to reverse if action is delayed? Where might protective measures prove inadequate? How should public agencies revise plans as evidence and the list of options change? Answering these questions would give researchers a clearer public purpose and help communities see why their work matters.
I urge universities and funding agencies to establish multiyear fellowships and research partnerships that connect emerging researchers with experienced mentors and public agencies.
Projects should be expected more fully to explain ubiquitous uncertainties and produce findings that can inform actual planning decisions.
Governments, in turn, should make space for that evidence in regular reviews of climate preparedness.
A cooler future would be worth pursuing, but that future will only materialize decades into the future. Climate impacts, in the meantime, will not disappear. Instead, they will likely be locked into a much more dangerous global environment that will not retreat.
Understanding what could and could not be restored requires people prepared to spend their careers asking and answering difficult questions. We must give them the opportunity to begin that quest now.
Gary Yohe is Huffington Foundation Professor of Economics and Environmental Studies, Emeritus, at Wesleyan University. The views expressed in this article are the writer’s own.