Some months ago I reviewed Slavoj Zizek’s “The Courage of Hopelessness”. I suggested that Zizek’s political projections would have little chance of materializing because economic collapse precipitated by climate mitigation efforts in the rich world would overwhelm everything else in but a few short decades. Next I came across G. Gaul’s “Geography of Risk” which, though focusing on storms and sea-level effects on the U.S. East and Gulf coasts, supported my prediction. Now this, “The Uninhabitable Earth” (review & link below), comes along amplifying everything in the Gaul book and laying down an even more frightening picture not only about where present trends are taking us, but the almost certain inevitability of vast tracts of the equatorial and presently-temperate Earth becoming uninhabitable by 2100.

Most of the cascades described by Wallace-Wells have already been triggered and will not stop (though they would slow a bit) even if we ceased all industry-related atmospheric carbon production tomorrow, something that is obviously not going to happen. Technology (as he points out) is not going to save us this time. We do know how to pull carbon out of the air yes, but as Wallace-Wells shows, we cannot afford to deploy enough of it fast enough to block a two to three degree (celsius) rise in average global temperatures over the next 75 years.

Wallace-Wells is (non-optimistically) hopeful that humanity will wake up in time to stop carbon output at least soon enough to halt future warming at three degrees. In fact I believe human industrial carbon output (most of it, globally) will cease in another ten or twenty years, roughly when we are close to two degrees of warming (as of 2018 we were at one degree and some change with atmospheric carbon rising faster now, year on year, than it has ever before). But it won’t stop because humans wake up and do something about the problem. It will stop because all of the economies of the world will have collapsed. Over a few decades, people will starve (or die from disease and war) in such vast numbers that few will be left to put any substantial carbon into the atmosphere more than the cooking fires that could be found dotting the Earth ten thousand years ago. The human population will be about where it was ten thousand years ago. That might be by 2100, likely sooner than that.

Still all of the cascades, devastating forest fires and melting permafrost will yet be releasing billions of tons of carbon even in the absence of human industry, and of course ocean levels will continue to rise utterly changing the geography of the world. By 2200 there will be very few places on Earth where food can be grown or hunted and the human race may be reduced to levels barely able to avoid extinction, if even that. If this isn’t frightening enough, the news gets worse from here. Even if the temperature rise tops out at three or four degrees, the planet will not again return to a cooler, human-comfortable climate regime, for thousands, possibly tens-of-thousands, of years!

Here is another book on the subject reinforcing the idea that we are in bigger trouble than we think: “Water” by Steven Solomon, 2011

Uninhabitable Earth  by David Wallace-Wells 2018

This book opens with what, for me, was a surprise. I know that carbon emissions have, world-wide, steadily increased even since the first international “climate mitigation agreements” of thirty years ago. What I did not know is that since 1990, the world, collectively, has pumped twice as much carbon into the atmosphere as it did in the thirty years from 1960 to 1990. There are other surprises: Bitcoin anyone? Sure there’s some electricity involved but how much carbon could that be? It turns out to be about as much, per year, as one million international jet flights! Our own industrial activity is only a part (albeit still a large part) of the problem now. Other, cascading effects, are now adding their impact. Global wild-fires now consume, on average, ten times as much forest every year as they did thirty years ago. That’s a lot of extra carbon. Even worse, the world’s permafrost is beginning to melt releasing carbon in the form of methane which, depending on whether we are speaking of low or high altitude, has between four and eighty times the warming effect of carbon dioxide.

The title of the book is prescient. Think of the climatologically worst environments on the Earth today (having warmed a bit more than one degree Celsius since the beginning of the industrial revolution in 1800. We are on track to hit two degrees by 2050 or so), perhaps the middle of the Sahara, Arizona in the summer, or someplace where it never stops being hot and raining. These are today’s most inhospitable climate environments. By 2100, that sort of place will be among the best and most livable we have on Earth. Large parts of our world will be largely and literally uninhabitable, places where humans die because their bodies cannot cool themselves by sweating unless immersed in cool water, or because there is no water the glaciers being gone, and this at only three degrees of warming (2100).

The first third of the book is about various cascades, most already triggered, some on the verge. Effects of warming add up both by directly making things worse and by degrading the planet’s ability to absorb carbon and mitigate the other effects. Wallace’s picture here is very dire. In the rest of the book, Wallace deals with the economic, political, social, and psychological future. Here I do not think he is dire enough. He speaks of refugees in the tens of millions (try hundreds of millions), extremist movements on both the right and left, of wars, pandemics, crop failures, of collapsing economies unable to sustain the cost of climate mitigation, and that only the economies that can afford any mitigation to begin with. The rest will have since joined the refugees. Wallace touches on all of this, but I do not think he fully appreciates how quickly and thoroughly human beings can (and will) turn on one another long before this all becomes as bad as it’s going to get!

Technology will not save us. Wallace covers that too. We can desalinate water and even pull carbon out of the air. There will never be enough of either that the world can afford. Besides, both are energy-intensive processes, and even if powered with renewable energy, that is not easy to do as concerns the long chain of activities needed to build and maintain that technology. Solar and wind power, for that matter almost all modern electronics, require elements called “rare earths”.  Rare-Earth mining is a carbon-intensive process.

In the end, Wallace is hopeful, though not optimistic, that the global polity will wake up and de-carbonize the global economy, not in time to halt two to three degrees of warming, it is already too late for that, but in time to prevent it going to four degrees or more. I think he is over-optimistic here too. It is simply not possible, politically, and this for economic reasons, for soon-to-be nine-billion humans to de-carbonize as quickly as needed to hold the line at two to three degrees. What will force the race to de-carbonize will be economic collapse, leading to socio-political collapse, leading to mass death (over some decades) from starvation, disease, or war. I think Wallace sees this grim possibility. He hopes it isn’t inevitable.

This a good and timely book though I doubt it will have much effect on the carbon trajectory of our so-called civilization. It is good to see the ground covered as much as Wallace covers it. He does a good job of showing how the climatological and the political go together (alas perversely). I think he fails to draw some obvious conclusions from his own well-made points. Perhaps it’s for the better. He would be accused of doom saying. I am a doomsayer! Feel free to accuse me! Meanwhile, the book is frightening enough as it is!