The odds are that the entire continental United States will swelter through a hotter-than-normal summer this year. And no surprise there. It seems as if that’s been the forecast every spring for years now. But this summer promises to eclipse even the summer of 2023, which, in the Northern Hemisphere, was the hottest since at least the year 1 AD, according to tree-ring analysis. You read that correctly: this summer may be hotter than any summer in the last 2,024 years (and undoubtedly many tens of thousands before that, since tree rings can take the data back only so far).
The world’s hot future has already arrived in parts of the Global South, thanks largely to past greenhouse gas emissions mainly from the Global North. On May 29th, in Delhi, India, residents suffered under record-melting 127-degree heat. Earlier in May, deadly heat descended on Southeast Asia. The heat index (the “feels like” temperature that takes humidity into account) exceeded 125 degrees in both Manila and Bangkok this spring, thereby “rewriting climatic history,” according to experts.
And here’s the simple truth: when it comes to a sweltering planet, that’s only the start and no one is safe anymore. Last year, 3.8 billion people globally suffered dangerous heat for at least a short period of time and that number will only continue to rise. In fact, heat deaths are forecast to skyrocket by a staggering 370% over the next 25 years.
In so many places experiencing extreme heat, air conditioning will become nothing short of a protective survival tool, but (all too sadly) it’s also a prodigious generator of — yes, of course! — greenhouse gases. The climate impact of air conditioning and refrigeration, which together already account for more than 10% of global greenhouse gas emissions from all sources, is expected to double in the next 25 years. If that happens, the world’s nations will be thrown even further off track when it comes to fulfilling their pledges to meet U.N. climate goals.
The question is: Can we somehow work ourselves free of such a dependence on industrial cooling, or have we already passed the point of no return?
Between 2005 and 2015, I wrote a lot of pieces (as well as a book) about air conditioning and talked a lot about it, too. I’ve long focused on how a technology designed to keep us comfortable in hot weather simultaneously ensures even hotter future summers. Consider it the feedback loop from hell in which the greenhouse gas emissions air conditioning releases ensure that even more cooling will be required as time passes, dragging humanity into yet another intensifying feedback loop of heat. The question of how to break that cycle has always been a vexing one and will only become more so as the cycle spins ever faster.
I’ve always made it a point to emphasize the life-saving role that air conditioning plays during severe heat waves, stressing that what I want to see eliminated is the routine overcooling that occurs at other times. Consider the widespread American practice of keeping windows closed year-round and simply switching the thermostat from “heat” to “cool” in the spring and back to “heat” in the fall. That not only wastes energy and increases emissions, but also squanders opportunities to enjoy comfortably warm stretches of summertime and comfortably cool stretches of winter that commonly occur in much of the country. Sadly, though, if those grim climate forecasts prove correct (and unless global emissions are reduced dramatically and fast, there’s no doubt they will be), such temperate summer interludes will become rarer and shorter in the years ahead, and Americans will become even more dependent on indoor cooling.
I’m not going to stop defending open windows or critiquing air conditioning just because the world’s getting hotter, but I’ll need to stress more than ever that the harms aggravated by air conditioning extend well beyond global warming. For example, as I’ve frequently pointed out, in many towns and suburbs, the overuse of air conditioning has quelled community spirit. Front porches, yards, sidewalks, playgrounds, and parks that abounded with human life on pleasant 80-degree evenings before the era of ubiquitous air conditioning are now largely deserted for much of the summer.
Together, air conditioning and digital technology — an addictive tag team if there ever was one — have played a crucial role in luring American children and adults indoors for an estimated 90% or more of our existence. Social life in countless neighborhoods and communities has been transformed, and not for the better. At the same time, increasing alienation from the non-human natural world, often described as “nature deficit disorder,” has become a topic of deep concern. As the outdoors grows ever hotter while the indoors remains comfy, it’s likely that collective social life and an appreciation of nature will shrink even further.
In yet another unfortunate feedback loop, air conditioning reduces the body’s physiological heat tolerance, creating the need for yet more cooling. It also affects our mental tolerance for heat. The “adaptive model of comfort,” a result of extensive research, shows that the temperature range in which we feel comfortable isn’t fixed but slides higher or lower depending on the temperatures our bodies have experienced in recent days or weeks. If we’re amply exposed to warming weather in spring and summer, our brains acclimatize. Conversely, if we avoid exposure to heat by staying in a controlled environment most of the time, we don’t build up heat tolerance, either mental or physical.
In today’s context, the message couldn’t be clearer: if you spend time outdoors when temperatures are in the 80s, you’ll be better prepared to experience the outdoors when they rise into the 90s or maybe even hit 100. But as we venture into a much hotter future, it will be physiologically impossible to develop a tolerance for 115 degrees, let alone the 127 degrees that struck Delhi in May, no matter how much time we’ve spent in the heat beforehand.
Priti Gulati Cox and I live without air conditioning by choice. She grew up in South India without air-conditioning, while I spent my childhood in North Georgia, also AC-less. As it happens, we both have an aversion to the indoor climate it produces — at times chilly, at times stuffy, always dry, dead-still, and silent. But as the years pass, temperatures in Salina, Kansas, our home, will undoubtedly rise into the red zone ever more often. And we’ll find ourselves resorting to air conditioning, however remorsefully, as killer heat domes park themselves over Kansas.
Priti and I have long depended on fans — ceiling, pedestal, desktop, you name it — to get through summers in relative comfort. But even today, and certainly in our greenhouse future, the weather in many parts of the United States will get so hot and dry that fans can’t keep the human body cool enough and may, in fact, become a mortal threat by ensuring that the body will heat yet more. In normal conditions, fans cool the body in a couple of ways: by flooding us with air at a lower temperature and by evaporating sweat from our skin, in both cases transferring heat away from us. But ominously enough, recent research shows that when the temperature exceeds 95 degrees, the fan’s breeze can’t absorb heat from your skin. And if it’s really hot, it will, in fact, transfer heat to you, potentially preparing the conditions for a possible heat stroke.
Stan Cox is the author of The Green New Deal and Beyond: Ending the Climate Emergency While We Still Can (City Lights, May, 2020) and one of the editors of Green Social Thought.
Source: CounterPunch
