Category Archives: Greenhouse Warming

When Will Climate Change Make the Earth Too Hot For Humans? Heat Death – David Wallace Wells. 

The bahraining of New York.

Humans, like all mammals, are heat engines; surviving means having to continually cool off, like panting dogs. For that, the temperature needs to be low enough for the air to act as a kind of refrigerant, drawing heat off the skin so the engine can keep pumping. At seven degrees of warming, that would become impossible for large portions of the planet’s equatorial band, and especially the tropics, where humidity adds to the problem; in the jungles of Costa Rica, for instance, where humidity routinely tops 90 percent, simply moving around outside when it’s over 105 degrees Fahrenheit would be lethal. And the effect would be fast: Within a few hours, a human body would be cooked to death from both inside and out.

Climate-change skeptics point out that the planet has warmed and cooled many times before, but the climate window that has allowed for human life is very narrow, even by the standards of planetary history. At 11 or 12 degrees of warming, more than half the world’s population, as distributed today, would die of direct heat. Things almost certainly won’t get that hot this century, though models of unabated emissions do bring us that far eventually. This century, and especially in the tropics, the pain points will pinch much more quickly even than an increase of seven degrees. The key factor is something called wet-bulb temperature, which is a term of measurement as home-laboratory-kit as it sounds: the heat registered on a thermometer wrapped in a damp sock as it’s swung around in the air (since the moisture evaporates from a sock more quickly in dry air, this single number reflects both heat and humidity). At present, most regions reach a wet-bulb maximum of 26 or 27 degrees Celsius; the true red line for habitability is 35 degrees. What is called heat stress comes much sooner.

Actually, we’re about there already. Since 1980, the planet has experienced a 50-fold increase in the number of places experiencing dangerous or extreme heat; a bigger increase is to come. The five warmest summers in Europe since 1500 have all occurred since 2002, and soon, the IPCC warns, simply being outdoors that time of year will be unhealthy for much of the globe. Even if we meet the Paris goals of two degrees warming, cities like Karachi and Kolkata will become close to uninhabitable, annually encountering deadly heat waves like those that crippled them in 2015. At four degrees, the deadly European heat wave of 2003, which killed as many as 2,000 people a day, will be a normal summer. At six, according to an assessment focused only on effects within the U.S. from the National Oceanic and Atmospheric Administration, summer labor of any kind would become impossible in the lower Mississippi Valley, and everybody in the country east of the Rockies would be under more heat stress than anyone, anywhere, in the world today.

As Joseph Romm has put it in his authoritative primer Climate Change : What Everyone Needs to Know, heat stress in New York City would exceed that of present-day Bahrain, one of the planet’s hottest spots, and the temperature in Bahrain “would induce hyperthermia in even sleeping humans.” The high-end IPCC estimate, remember, is two degrees warmer still. By the end of the century, the World Bank has estimated, the coolest months in tropical South America, Africa, and the Pacific are likely to be warmer than the warmest months at the end of the 20th century. Air-conditioning can help but will ultimately only add to the carbon problem; plus, the climate-controlled malls of the Arab emirates aside, it is not remotely plausible to wholesale air-condition all the hottest parts of the world, many of them also the poorest. And indeed, the crisis will be most dramatic across the Middle East and Persian Gulf, where in 2015 the heat index registered temperatures as high as 163 degrees Fahrenheit. As soon as several decades from now, the hajj will become physically impossible for the 2 million Muslims who make the pilgrimage each year.

It is not just the hajj, and it is not just Mecca; heat is already killing us. In the sugarcane region of El Salvador, as much as one-fifth of the population has chronic kidney disease, including over a quarter of the men, the presumed result of dehydration from working the fields they were able to comfortably harvest as recently as two decades ago. With dialysis, which is expensive, those with kidney failure can expect to live five years; without it, life expectancy is in the weeks. Of course, heat stress promises to pummel us in places other than our kidneys, too. As I type that sentence, in the California desert in mid-June, it is 121 degrees outside my door. It is not a record high.

III. The End of Food

Praying for cornfields in the tundra.

continue reading: New York Magazine

When Will Climate Change Make the Earth Too Hot For Humans? Doomsday – David Wallace Wells. 

I. ‘Doomsday’

Peering beyond scientific reticence.

It is, I promise, worse than you think. If your anxiety about global warming is dominated by fears of sea-level rise, you are barely scratching the surface of what terrors are possible, even within the lifetime of a teenager today. And yet the swelling seas — and the cities they will drown — have so dominated the picture of global warming, and so overwhelmed our capacity for climate panic, that they have occluded our perception of other threats, many much closer at hand. Rising oceans are bad, in fact very bad; but fleeing the coastline will not be enough.

Indeed, absent a significant adjustment to how billions of humans conduct their lives, parts of the Earth will likely become close to uninhabitable, and other parts horrifically inhospitable, as soon as the end of this century.

Even when we train our eyes on climate change, we are unable to comprehend its scope. This past winter, a string of days 60 and 70 degrees warmer than normal baked the North Pole, melting the permafrost that encased Norway’s Svalbard seed vault — a global food bank nicknamed “Doomsday,” designed to ensure that our agriculture survives any catastrophe, and which appeared to have been flooded by climate change less than ten years after being built.

The Doomsday vault is fine, for now: The structure has been secured and the seeds are safe. But treating the episode as a parable of impending flooding missed the more important news. Until recently, permafrost was not a major concern of climate scientists, because, as the name suggests, it was soil that stayed permanently frozen. But Arctic permafrost contains 1.8 trillion tons of carbon, more than twice as much as is currently suspended in the Earth’s atmosphere. When it thaws and is released, that carbon may evaporate as methane, which is 34 times as powerful a greenhouse-gas warming blanket as carbon dioxide when judged on the timescale of a century; when judged on the timescale of two decades, it is 86 times as powerful. In other words, we have, trapped in Arctic permafrost, twice as much carbon as is currently wrecking the atmosphere of the planet, all of it scheduled to be released at a date that keeps getting moved up, partially in the form of a gas that multiplies its warming power 86 times over.

Maybe you know that already — there are alarming stories in the news every day, like those, last month, that seemed to suggest satellite data showed the globe warming since 1998 more than twice as fast as scientists had thought (in fact, the underlying story was considerably less alarming than the headlines). Or the news from Antarctica this past May, when a crack in an ice shelf grew 11 miles in six days, then kept going; the break now has just three miles to go — by the time you read this, it may already have met the open water, where it will drop into the sea one of the biggest icebergs ever, a process known poetically as “calving.”

But no matter how well-informed you are, you are surely not alarmed enough. Over the past decades, our culture has gone apocalyptic with zombie movies and Mad Max dystopias, perhaps the collective result of displaced climate anxiety, and yet when it comes to contemplating real-world warming dangers, we suffer from an incredible failure of imagination. The reasons for that are many: the timid language of scientific probabilities, which the climatologist James Hansen once called “scientific reticence” in a paper chastising scientists for editing their own observations so conscientiously that they failed to communicate how dire the threat really was; the fact that the country is dominated by a group of technocrats who believe any problem can be solved and an opposing culture that doesn’t even see warming as a problem worth addressing; the way that climate denialism has made scientists even more cautious in offering speculative warnings; the simple speed of change and, also, its slowness, such that we are only seeing effects now of warming from decades past; our uncertainty about uncertainty, which the climate writer Naomi Oreskes in particular has suggested stops us from preparing as though anything worse than a median outcome were even possible; the way we assume climate change will hit hardest elsewhere, not everywhere; the smallness (two degrees) and largeness (1.8 trillion tons) and abstractness (400 parts per million) of the numbers; the discomfort of considering a problem that is very difficult, if not impossible, to solve; the altogether incomprehensible scale of that problem, which amounts to the prospect of our own annihilation; simple fear. But aversion arising from fear is a form of denial, too.

In between scientific reticence and science fiction is science itself. This article is the result of dozens of interviews and exchanges with climatologists and researchers in related fields and reflects hundreds of scientific papers on the subject of climate change. What follows is not a series of predictions of what will happen — that will be determined in large part by the much-less-certain science of human response. Instead, it is a portrait of our best understanding of where the planet is heading absent aggressive action. It is unlikely that all of these warming scenarios will be fully realized, largely because the devastation along the way will shake our complacency. But those scenarios, and not the present climate, are the baseline. In fact, they are our schedule.

The present tense of climate change — the destruction we’ve already baked into our future — is horrifying enough. Most people talk as if Miami and Bangladesh still have a chance of surviving; most of the scientists I spoke with assume we’ll lose them within the century, even if we stop burning fossil fuel in the next decade. Two degrees of warming used to be considered the threshold of catastrophe: tens of millions of climate refugees unleashed upon an unprepared world. Now two degrees is our goal, per the Paris climate accords, and experts give us only slim odds of hitting it. The U.N. Intergovernmental Panel on Climate Change issues serial reports, often called the “gold standard” of climate research; the most recent one projects us to hit four degrees of warming by the beginning of the next century, should we stay the present course. But that’s just a median projection. The upper end of the probability curve runs as high as eight degrees — and the authors still haven’t figured out how to deal with that permafrost melt. The IPCC reports also don’t fully account for the albedo effect (less ice means less reflected and more absorbed sunlight, hence more warming); more cloud cover (which traps heat); or the dieback of forests and other flora (which extract carbon from the atmosphere). Each of these promises to accelerate warming, and the history of the planet shows that temperature can shift as much as five degrees Celsius within thirteen years. The last time the planet was even four degrees warmer, Peter Brannen points out in The Ends of the World, his new history of the planet’s major extinction events, the oceans were hundreds of feet higher.*

The Earth has experienced five mass extinctions before the one we are living through now, each so complete a slate-wiping of the evolutionary record it functioned as a resetting of the planetary clock, and many climate scientists will tell you they are the best analog for the ecological future we are diving headlong into. Unless you are a teenager, you probably read in your high-school textbooks that these extinctions were the result of asteroids. In fact, all but the one that killed the dinosaurs were caused by climate change produced by greenhouse gas. The most notorious was 252 million years ago; it began when carbon warmed the planet by five degrees, accelerated when that warming triggered the release of methane in the Arctic, and ended with 97 percent of all life on Earth dead. We are currently adding carbon to the atmosphere at a considerably faster rate; by most estimates, at least ten times faster. The rate is accelerating. This is what Stephen Hawking had in mind when he said, this spring, that the species needs to colonize other planets in the next century to survive, and what drove Elon Musk, last month, to unveil his plans to build a Mars habitat in 40 to 100 years. These are nonspecialists, of course, and probably as inclined to irrational panic as you or I. But the many sober-minded scientists I interviewed over the past several months — the most credentialed and tenured in the field, few of them inclined to alarmism and many advisers to the IPCC who nevertheless criticize its conservatism — have quietly reached an apocalyptic conclusion, too: No plausible program of emissions reductions alone can prevent climate disaster.

Over the past few decades, the term “Anthropocene” has climbed out of academic discourse and into the popular imagination, a name given to the geologic era we live in now, and a way to signal that it is a new era, defined on the wall chart of deep history by human intervention. One problem with the term is that it implies a conquest of nature (and even echoes the biblical “dominion”). And however sanguine you might be about the proposition that we have already ravaged the natural world, which we surely have, it is another thing entirely to consider the possibility that we have only provoked it, engineering first in ignorance and then in denial a climate system that will now go to war with us for many centuries, perhaps until it destroys us. That is what Wallace Smith Broecker, the avuncular oceanographer who coined the term “global warming,” means when he calls the planet an “angry beast.” You could also go with “war machine.” Each day we arm it more.

II. Heat Death

The bahraining of New York.

continue reading: New York Magazine

G20: Does Donald Trump’s awkward performance indicate America’s decline as a world power? – Chris Uhlmann. 

The G20 became the G19 as it ended. On the Paris climate accords the United States was left isolated and friendless.

It is, apparently, where this US President wants to be as he seeks to turn his nation inward.

Donald Trump has a particular, and limited, skill-set. He has correctly identified an illness at the heart of the Western democracy. But he has no cure for it and seems to just want to exploit it.

He is a character drawn from America’s wild west, a travelling medicine showman selling moonshine remedies that will kill the patient.

And this week he underlined he has neither the desire nor the capacity to lead the world.

Given the US was always going to be one out on climate change, a deft American President would have found an issue around which he could rally most of the leaders.

He had the perfect vehicle — North Korea’s missile tests.

So, where was the G20 statement condemning North Korea? That would have put pressure on China and Russia? Other leaders expected it and they were prepared to back it but it never came.

There is a tendency among some hopeful souls to confuse the speeches written for Mr Trump with the thoughts of the man himself.

He did make some interesting, scripted, observations in Poland about defending the values of the West.

And Mr Trump is in a unique position — he is the one man who has the power to do something about it.

But it is the unscripted Mr Trump that is real. A man who barks out bile in 140 characters, who wastes his precious days as President at war with the West’s institutions — like the judiciary, independent government agencies and the free press.

He was an uneasy, awkward figure at this gathering and you got the strong sense some other leaders were trying to find the best way to work around him.

Mr Trump is a man who craves power because it burnishes his celebrity. To be constantly talking and talked about is all that really matters. And there is no value placed on the meaning of words. So what is said one day can be discarded the next.

So, what did we learn this week?

We learned Mr Trump has pressed fast forward on the decline of the US as a global leader. He managed to diminish his nation and to confuse and alienate his allies.

He will cede that power to China and Russia — two authoritarian states that will forge a very different set of rules for the 21st century.

Some will cheer the decline of America, but I think we’ll miss it when it is gone.

And that is the biggest threat to the values of the West which he claims to hold so dear.


Impossible Foods CEO: we want to eliminate all meat from human diets.

It’s the veggie burger that bleeds. When eaten, it tastes and feels remarkably similar in your mouth to a burger made from animal meat.

After a blaze of publicity, the US-based company behind it, Impossible Foods, is scaling up production. A new facility in California will open before the end of the year with the ability to produce four million burgers a month.

Impossible Foods founder Pat Brown explains the impact he hopes to have on our health, the future of the livestock industry and the natural environment.

We think we’ve made choices that have the net effect of making this better for consumers’ health than what it replaces. There are intrinsic safety issues with food from animals. You can’t make ground beef without faecal bacteria getting into it. It’s part of the process. That carries irreducible food safety hazards which we can readily avoid.

There is no cholesterol [in our burger] … there is a significant population of people for whom it [cholesterol] has negative health consequences. There is also data suggesting that mammalian meat triggers an inflammatory response in humans that has some negative health consequences that we don’t have with our product.

The ultimate goal is to develop a way to produce all the foods we [traditionally] get from animals much more sustainably using scalable ingredients from plants and make these foods delicious, nutritious and affordable.

If we succeed completely in that there would obviously still be cows, pigs and chickens but they would not be a significant part of the food system but kept around because they are interesting creatures.

This notion that somehow the land is going to waste if we don’t have sheep grazing on it is ludicrous. If we can produce a food with everything a consumer values using a twentieth of the land and a quarter of the water and a tiny fraction of the greenhouse gas footprint then what’s the good of turning grass into cows? Raising animals on marginal land is the biggest reason why over the past 40 years the total wild animals on earth have been cut by a factor of two..

Before becoming a vegan] I loved putting milk in my coffee and cereal, but plant-based milks don’t work for me so far. No-one is trying very hard to deliver the full experience of what consumers value from milk. We don’t want to follow the course of soya and almond milk. We’re after 100% of the market, not a niche of people avoiding meat or being health conscious.

To capture the whole market you have to deliver whatever it is that consumers value from that category of product. People have been making veggie burgers forever but not trying to make something that replicates the crave-able experience that meat lovers enjoy.

We’ve found a safer and more sustainable way to produce heme [the ingredient that gives the burger its meat-like colour and taste]. It is scalable and enables us to make an affordable product. Our customers are restaurants at the moment so they are the ones communicating to customers, not us. They are completely aware of how we make the heme protein. It is also made clear on our website.

The fear of food science is things being done to our food that we haven’t been fully informed about and don’t understand, as opposed to science. Every food you eat is a product of science and thousands of years of people investigating what things from nature are healthy and delicious to eat and how to prepare and combine them to make something better than what you started with and more than the sum of the parts.

The Guardian

Donald Trump’s mission? To keep the US in the fossil age – George Monbiot. 

Recent research suggests that, if drastic action of the kind envisaged by the Paris agreement  on climate change is not taken, ice loss in Antarctica alone could raise sea levels by a metre this century, and by 15 metres in subsequent centuries. Combine this with the melting in Greenland and the thermal expansion of sea water, and you discover that many of the world’s great cities are at existential risk.

The climatic disruption of crucial agricultural zones – in North and Central America, the Middle East, Africa and much of Asia – presents a security threat that could dwarf all others. The civil war in Syria, unless resolute policies are adopted, looks like a glimpse of a possible global future.

These are not, if the risks materialise, shifts to which we can adapt. These crises will be bigger than our capacity to respond to them. They could lead to the rapid and radical simplification of society, which means, to put it brutally, the end of civilisations and many of the people they support. If this happens, it will amount to the greatest crime ever committed. And members of Trump’s proposed cabinet are among the leading perpetrators.

The Guardian

‘A cat in hell’s chance’ – why we’re losing the battle to keep global warming below 2C – Andrew Simms. 

It all seemed so simple in 2008. All we had was financial collapse, a cripplingly high oil price and global crop failures due to extreme weather events. In addition, my climate scientist colleague Dr Viki Johnson and I worked out that we had about 100 months before it would no longer be “likely” that global average surface temperatures could be held below a 2C rise, compared with pre-industrial times.

What’s so special about 2C? The simple answer is that it is a target that could be politically agreed on the international stage. It was first suggested in 1975 by the environmental economist William Nordhaus as an upper threshold beyond which we would arrive at a climate unrecognisable to humans. In 1990, the Stockholm Environment Institute recommended 2C as the maximum that should be tolerated, but noted: “Temperature increases beyond 1C may elicit rapid, unpredictable and non-linear responses that could lead to extensive ecosystem damage.”

To date, temperatures have risen by almost 1C since 1880. The effects of this warming are already being observed in melting ice, ocean levels rising, worse heat waves and other extreme weather events. There are negative impacts on farming, the disruption of plant and animal species on land and in the sea, extinctions, the disturbance of water supplies and food production and increased vulnerability, especially among people in poverty in low-income countries. But effects are global. So 2C was never seen as necessarily safe, just a guardrail between dangerous and very dangerous change.

The Guardian

When Scientists Hate Science – Paul A Offit. 

With Donald Trump’s recent picks to head the Environmental Protection Agency (Scott Pruitt) and the Energy Department (Rick Perry), it appears that science denialism has now been institutionalized. Pruitt, Perry, and Trump deny the fact that increasing levels of CO2 in the environment have trapped heat, causing an increase in the Earth’s surface temperature (“the greenhouse effect”), and consequent climate disruption. Although climate change is undeniable, the current administration has managed to deny it.

Climate change denialists couldn’t take their anti-science stance without the support of certain scientists. Although the overwhelming consensus among environmental scientists is that global warming is a real and present threat, a few disagree. Sadly, throughout history, science-denying scientists haven’t been hard to find.

In 1985, Barbara Loe Fisher, a prominent anti-vaccine activist, wrote A Shot in the Dark. In one chapter, Fisher claimed that vaccines caused autism. No one noticed. But when Andrew Wakefield, a respected scientist in the United Kingdom, published a paper in 1998 claiming that the measles-mumps-rubella (MMR) vaccine caused autism, everyone noticed. More than 1,500 articles trumpeting Wakefield’s theory appeared in newspapers and magazines across the globe. In the United Kingdom alone, thousands of parents stopped vaccinating their children with MMR; as a consequence, hundreds were hospitalized with measles and four children died from the disease.

Daily Beast