04/08/2019

'Quite Scary': Rising Temperatures Threaten Melbourne, Sydney's Water Security

Sydney Morning HeraldPeter Hannam

Sydney and Melbourne face rising threats to their water supplies from climate change as higher temperatures diminish inflows while pushing up demand, according to new research.
A paper published by Environment Research Letters shows a "substantially" amplified risk for Melbourne's water availability if global temperatures rise 2 degrees above pre-industrial levels rather than the 1.5-degree target set by the Paris climate agreement.
Water security for major Australian cities including Melbourne and Sydney is likely to become more of a challenge under climate change, scientists say. Credit: Brook Mitchell
Separate research by the University of NSW into future rainfall and temperatures for some 222 catchments across Australia - some of which serve Sydney - found a marked increase in vulnerability of supply.“It’s quite scary actually," Ashish Sharma, a professor in UNSW's School of Civil and Environmental Engineering, said. "The implications for water security for this region are not good."
Warmer temperatures lift evaporation rates and dry out catchments, reducing the chance of the medium-sized floods that typically provide the great bulk of reservoir inflows in any one year, Professor Sharma said.
“It is a double whammy," he said. "You’re having a reduced access to water and increased water demand - hence the vulnerability, the security of the water system, reduce even more.”
Internationally, those moderate floods are expected to decrease at the rate of about 13 per cent each degree of warming, Professor Sharma said, noting that current carbon emissions trajectories point to a 3.5-degree increase by 2100.

Record warmth in 2019
The dams serving both Sydney and Melbourne are hovering just above 50 per cent, with the former's falling more rapidly in recent years than during the Millennium Drought earlier this century.
The Cataract Dam to Sydney's south is less than a third full, among the lowest levels for reservoirs serving the Greater Sydney region. Credit: Brook Mitchell

Desalination plants in both cities are ramping up. The Victorian government in April ordered its plant at Wonthaggi to deliver 125 billion litres for the 2019-20 year, while Sydney's Kurnell plant is nearing its full capacity of about 91 billion litres per year.The first seven months have also been the hottest on record for maximum temperatures for Victoria and the second warmest for NSW, the Bureau of Meteorology said.
Benjamin Henley - who studies water resource impacts from climate change at the University of Melbourne and the lead author of the research paper - said a warming world pointed to reduced rainfall in southern states.
“In the south, we’re likely to face a long-term drying trend under climate change, and it has almost certainly started," Dr Henley said.
Even so, his team's work showed that for Melbourne at least, there was a "distinct difference" in the impacts for water security if temperature rises were kept to 1.5 degrees rather than 2 degrees.
Lily D'Ambrosio, Victoria's climate change minister and acting water minister, said the warming was "a reality".
"We know we need to act now and plan for how we can better withstand increasingly high temperatures, reduced water availability, and the impact this has on the environment," she said.
Water efficiency measures, stormwater capture and making better use of sources independent of rainfall such as desalination, would be part of that planning, she said.
Fiona Smith, WaterNSW's executive manager water and catchment protection, said her agency was continuing to assess climate projections, noting some models projected increased rainfall.
"Research into climate change impacts are progressing but without conclusive findings accurate predictions for the east coast of Australia for water security purposes are not yet available," she said.

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The Next Step In Fighting Climate Change

ForbesSteve Denning

Climate change is the crisis of our time.
As the human race sleepwalks its way towards a planetary calamity, there is a growing recognition of the need for a “moonshot” aimed at addressing the greatest existential challenge we have ever faced. The immediate problem is that a solid technical basis for such a moonshot does not yet exist. There is no audacious U.S. national plan in place to deal with climate change, quite apart from what other countries must do.
What we must now do is to create a fully empowered national climate change agency, devoted exclusively to climate change, with a mandate to prepare the carefully thought-through technical basis for an audacious action plan and with the political clout to make an impact.

How A Moonshot Happens
What is often forgotten in the celebration of America's space triumph of 1969 is that Kennedy’s speech of 1962, in which he inspired the nation to “go the moon by the end of the decade”, didn’t come out of the blue. In fact, the basis for it had already been laid in several distinct stages.
  • Stage 1: Pre-1958: Several competing agencies were striving for ownership of the American space effort: space: Army, Navy, Air force; there was no coherent national strategy, game plan or budget.
  • Stage 2: Creation of NASA in 1958: President Eisenhower established organizational clarity as to which agency was in charge of the space effort, but he didn't create the necessary priority or budget for the effort to succeed. It did nevertheless create the institutional and intellectual platform which provided the basis for the next step.
  • Stage 3: President Kennedy's 1962 speech articulated a clear national commitment to get to the moon before the end of the decade.
  • Stage 4: From 1962 to 1969, there was skillful maintenance and pursuit of the goal, through many difficulties, setbacks.
  • Stage 5: In July 1969, as promised, American men landed on the moon—an unparalleled feat of perseverance and ingenuity.
By way of comparison, the U.S. response to climate change is still in Stage 1: there are many ideas and studies, but no coherent national strategy, game plan, expert or political consensus or budget. The White House doesn’t even see that there is an issue. There are organizations and agencies producing studies and reports, but no mandate or urgency for action.

Stages of launching a moonshot. Steve Denning
Given the current administration, any major change in the situation will have to come in the next administration. Nevertheless, it is not too early to consider the necessary steps, beginning with a decision to take bold action.

Current Planning Is Inadequate
What’s happening now is sporadic, haphazard, ill-planned and tragically inadequate.
For example, as a sign of its commitment to climate change, Berkeley recently announced with pride that it has banned the use of natural gas in new low-rise buildings; this results in greater use of electricity generated by coal power plants with high pollution consequences.
Similarly, people may feel virtuous if they purchase electric cars, but the impact on climate change isn't clear if the cars are also using electricity generated by coal. Flailing away at climate change with symbolic actions that feel good and sound good but make no impact isn't going to get the job done.
Wind and solar are often presented as the keys to the future. Yet there is no coherent policy as to their future in the U.S. Wind and solar energy have few downsides per se but are not available 24 hours every day; Europe has found that dealing with the ups and downs of production can create practical problems.
A carbon tax is widely advocated by economists, yet the U.S. is one of the few large and industrialized nations that does not implement one. The basis for it is simple. Carbon emissions have an "unpriced" societal cost in terms of their harmful effects on the earth's climate. A tax on carbon would reflect these costs and send a powerful price signal that would discourage carbon emissions. Such a tax could have regressive income effects, but they could be alleviated by the way the resulting revenues are allocated. Carbon tax has a diverse array of advocates including Rex Tillerson, when he was CEO of Exxonmobil, the American Enterprise Institute, the Earth Policy Institute, and the Sierra Club, and the Washington Environmental Council. Yet no carbon tax is in place in the U.S. and none is even being seriously discussed.
Having an institution that is capable of thinking through the multi-sectoral issues involved in assessing the trade-offs, the inter-connections and the sequencing of different options and pushing ahead to action is going to be central to having any kind of real impact. At this point, there is not a single official at the highest levels of U.S. government who can speak sensibly on the subject.

Drawdown
Drawdown by Paul Hawken Penguin
The technical complexity of the choices facing us were brought home to me in reading Paul Hawken's interesting book, Drawdown: The Most Comprehensive Plan Ever Proposed to Reverse Global Warming (2017). It examines and prioritizes 80 ready-now climate-changing ideas, and quantifies their potential impact, along with 20 ideas that might materialize in the future, including direct air capture, hydrogen-boron fusion, autonomous vehicles, solid-state wave energy and living buildings. The ideas are listed in this summary table, along with their potential impacts from a global perspective.
The analysis contains quite a few surprises. Refrigerant management comes in at #1 while solar only ranks #8 and #10. Changes in household appliances doesn’t even make the top 80 options. Nor does natural gas make the top 80 options, even though the U.S. is leading the world in the reduction of CO2 through the conversion to natural gas. The question is not whether Hawken has everything right: his analysis shows the complex multi-sectoral nature of the issues. What does it all add up to?
On a “plausible” level of effort, the total amount of carbon dioxide avoided and sequestered is 1,051 gigatons by 2050, which is only two-thirds of what is needed to stop the increase of carbon dioxide in the atmosphere.
With a much greater level of effort, “the drawdown scenario,” the increase could be effectively stopped by 2050.
With an even greater level effort, the level of carbon dioxide could be reduced by 170 gigatons of carbon dioxide by 2050.
Options for dealing with climate change, from Drawdown by Paul Hawken Penguin
LARGE IMAGE
The book does not address the possibility that unless substantially greater progress by 2030, the opportunity for reversing the growth of greenhouse gases may close.
The book is helpful in mapping the territory of the options. “The overwhelming majority are no-regrets solutions, initiatives we would want to achieve regardless of their ultimate impact on emissions and climate, as they are practices that benefit society and the environment in multiple ways.”
It also notes several options for which we might have serious regrets if they were widely adopted, such as nuclear fission:
Nuclear [fission] is a regrets solution, and regrets have already occurred at Chernobyl, Three Mile Island, Rocky Flats, Kyshtym, Browns Ferry, Idaho Falls, Mihama, Lucens, Fukushima Daiichi, Tokaimura, Marcoule, Windscale, Bohunice, and Church Rock. Regrets include tritium releases, abandoned uranium mines, mine-tailings pollution, spent nuclear waste disposal, illicit plutonium trafficking, thefts of fissile material, destruction of aquatic organisms sucked into cooling systems, and the need to heavily guard nuclear waste for hundreds of thousands of years.
The book only paints the global picture: each country, region and community will have to make its own set of choices from the larger menu. Not all countries have tropical forests; sunlight and wind vary considerably. Obviously, some options would have greater impact sooner, if there was a greater level of effort.

The Issue Is Political And Technical
In one sense, the central issue is political. Summoning up the political willpower to do whatever is necessary to redress the situation, aggressively implementing the solutions that are ready for implementation, while exploring a whole slew of promising new technologies.
The U.S. needs to rediscover its pioneer spirit and once again become an international leader rather than a laggard. The fact that the current U.S. administration sleeps at the wheel and allows the country to careen towards an avoidable calamity need not prevent us from getting ready to take the necessary next step—the creation of a federal agency to lay the basis for a national effort to fight climate change, while also inspiring other nations to do likewise.
Thus in another sense the questions are also technical. Politicians are not climate scientists. They are not going to be the ones to sort out the massive complexities described by Paul Hawken in Drawdown. Nor should they be. The role of politicians is to endorse and communicate carefully thought-through technical policies and plans developed by a wide array of climate scientists, economists, sociologists and management experts, working together as outlined here.

A Different Kind Of War
Make no mistake, we are caught in a deadly war. Nothing will happen unless and until we grasp the magnitude of the challenge we face and share the belief that we have the technology, the smarts, the innovative capability, in effect the will to win the war.
The problem with this war is that the enemy is ourselves. As I described here, the core of the problem is that the burning of hydrocarbons is the foundation of many of the huge improvements in the material well-being of the human race over the last century. As a species, our brains have been created to ignore risks that appear distant in time and place. Countering human nature is hard. There are also many vested interests in maintaining the status quo.

Winning The War
Winning the war will require deep changes in consumption, technology, behavior, attitudes and education as well as radically increasing efforts institutional and social innovation. That’s why we need a moonshot.
A moonshot implies a change in mindset. It means a shift from accepting our fate as defined by events and taking things into our own hands, believing that we can and will change the future. It’s about looking beyond what we currently see and envisioning answers that may seem unreasonable—and pursuing them anyway. It’s about doing things that sound undoable but if done will redefine everything.
We don’t want or need a climate scientist as president. Nor do we need a candidate with a personally crafted, detailed climate plan. What we need is a leader who has the smarts to grasp the nature and magnitude of the challenge and mobilize action to deal with it. We need a leader who is able to inspire and lead us to win this war. The first and most urgent action is the creation of a fully empowered national climate change agency.
We have done monumental things before, whether it was the actual moonshot with NASA, the Internet with DARPA and the nuclear fission with the Manhattan Project. In each case through a coordinated national effort, we were able solve huge problems through innovation that led to radically new technical solutions that changed everything. As Astro Teller said, we were able replace apathy with audacity:
The seemingly impossible can happen when passionate and talented people come together with urgency and determination. The secret? It’s easier to get people to work on making something 10X better than to get them to help make it 10% better. Huge problems fire up our hearts as well as our minds. When you’re aiming for a 10X gain, you have to find whole new ways of doing things, and lean on bravery and creativity — the kind that, literally and metaphorically, can put a person on the moon.
The space race was valuable far beyond its original goal: NASA’s work has led to dozens of technology breakthroughs with many everyday uses, and inspired generations of kids like me to fall in love with science and engineering. When the world’s problems make us feel small and helpless, we should reflect on the lessons the Apollo missions hold about human nature, and our ability to choose bravery over fear and set aside apathy in favor of audacity.
The State Of The Current Political Debate
Listening to the debate among politicians about climate change today—or more often, the absence of debate—can be dispiriting. It brings to mind the poem written by W.H. Auden in 1939 at a time when a different kind of global crisis was in the offing.
Intellectual disgrace
Stares from every human face,
And the seas of pity lie
Locked and frozen in each eye.
Creating another federal agency may not seem like a big deal. The day that we create such an agency the world will go on as before. It will be seen as something plodding, mundane, even boring. Only a few that think of it as day as one in which we did something unusual: a day that lays the basis for securing the future of the human race. Nor should there be any beating of drums or great celebration. The real work will still be in front of us. But something will have begun.
Having an agency in place won’t solve the problem by itself. Periods of blistering heat and extreme weather events will continue to afflict us for years to come. But something significant will have begun. We will have created the basis for unlocking the hidden talents and aspirations of the human race to preserve the beauty of our world for our children and our grandchildren. As Auden said:
In the deserts of the heart
Let the healing fountain start.
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Climate Change Visible From Space Station

Canberra Times - AAP

Italian Luca Parmitano (top) was sent to the ISS on July 20 along with two other astronauts.
Astronaut Luca Parmitano has warned he has seen the ravages of the climate crisis from the International Space Station.
The Italian engineer, of the European Space Agency, spoke about the issue during a press conference from the space station.
He said that changes in the appearance of the planet are noticeable from the satellite, which orbits 408 km from Earth.
"From the ISS we can make human observation and what I can say is that I have seen in my photographs and those of my companions in the last six years authentic changes," he added.
"I have seen deserts move forward and glaciers melt."
He said he will continue sharing photos on social media and warning people about the problem.
"I hope that our words and view can be shared to alarm people and really warn about the number one enemy today: global warming," he added.
"I don't know if it is possible to reverse it, but we must do everything possible to reduce and stop it."
Parmitano gave his first press conference since his arrival at the orbital station a week ago.
It is his second time on the habitable satellite after his first mission, Volare, in 2013.
The 42-year-old has been put into orbit as part of the Beyond mission, which includes experiments to pave the way for future space exploration, such as returning to the Moon or an expedition to Mars.
Parmitano was sent to the space station with American Andrew Morgan and Russian Alexander Skvortsov on July 20.
He will spend two hundred days in zero gravity and during the second half of the mission will be in charge of commanding the orbital laboratory, the first Italian to do so.

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The Climate Crisis Movie Isn’t Out Yet, But We Just Saw The Trailer

Esquire

It's the first summer of the rest of our lives.
Getty Images, SIPA/AP
Perhaps we'll remember the week of July 21, 2019 as the first teaser trailer for the apocalypse. Or maybe we're farther along than that. After all, it was 108 degrees in Paris on Thursday—and not Paris, Texas, either. The Arctic is on fire. And the American West has a bit of a water problem, in that there isn't very much of it.
But it was America's most populous city that played host to a series of events this past week that may best encapsulate the range of horrors that await the human race now that we've proven ourselves determined to ignore the warnings of scientists. We've chosen instead to continue pulling coal and gas and oil out of the ground and to set fire to them at an alarming rate, a process which produces energy and lots of money for the people doing the burning. It also releases the gas, carbon dioxide, that is gathering in our atmosphere to heat up and destabilize our planet and threaten the future of human civilization as we know it. New York City just showed us what that might look like: more hot days, hotter hot days, and extreme rain events that will be more extreme. It wasn't never-before-seen, but the science indicates it will soon be the scene far more frequently.
On July 21, the temperature in New York hit 100 degrees. Historically, the city of New York has seen two days a year where the heat index—temperature plus humidity, or what it feels like outside—reaches 100 degrees or higher. But recent research suggests that extreme heat events will be more and more common in the coming years. By midcentury, if we take no action to mitigate the effects of climate change, it will be 18 days. (Chicago will go from three to 26. Dallas will go from 30 to 92. Even Green Bay will go from one to 10.) This past Sunday, it was hot enough in New York to drive electricity demand to the point that the city experienced partial blackouts in Brooklyn. ConEdison also reported equipment failures. That followed a blackout in Manhattan's Midtown and Upper West Side earlier in the month.
And that was just the fire. The next day, the city got the main event of our climate-crisis teaser: the water. A summer thunderstorm rolled into town—again, not unprecedented—but the results were fairly biblical. At one point, three inches of rain an hour were falling in Brooklyn, and it led to devastating scenes, particularly in the area around Carroll Street and Fourth Avenue, a topographical low point where the water ran down from neighboring Park Slope and gathered in massive volume. The videos from bystanders made the oft-and-understandably ridiculed Day After Tomorrow look a little less ridiculous. "The basic thing that makes extreme precipitation events heavier in the warmer climate is that there’s more water vapor in the air, and that’s a pretty unquestioned consequence of warming," says Adam Sobel, professor of applied physics and applied mathematics at Columbia University. "The amount of water vapor in the atmosphere increases roughly about seven percent per degree Celsius. And so, the baseline expectation is that heavy rain events get heavier at about that rate also. Some models increase them faster than that, and some slower." It's too soon to draw direct conclusions about whether climate change had an effect on Monday's storm specifically, but it very likely fits in this established pattern.
Total annual rainfall is only expected to increase two or three percent globally over the coming decades, but the real effects of warming will be felt in individual extreme events. There won't necessarily be more of them, but they will be more severe. 2017's Hurricane Harvey was a prime example of this: the storm reportedly dropped 27 trillion gallons of water on Texas and Louisiana, and hit the city of Houston particularly hard. It was also so destructive—the storm caused $125 billion in damage, behind only Hurricane Katrina all-time—because Harvey moved so slowly, and hovered over the Gulf Coast area for days. Sobel says there's some new research that the storm's glacial pace of movement may also have been tied to warming temperatures, but it lacks the widespread acceptance that the water vapor theories have. Of course, scientists are extremely confident that warmer ocean temperatures also lead to more ferocious storms, as wind speeds pick up and supercharge the cyclone's destructive potential.
New Yorkers seek relief from the heat in the fountains of Flushing Meadows Park in Queens. JOHANNES EISELE Getty Images


One factor in Houston was the sheer amount of asphalt and cement that covers the city. These surfaces do not take on water in the way that earth does, and can lead to more severe flooding events. As storms begin to drop more water, faster thanks to warming temperatures, this effect will be magnified. New York has the same problem: as much as 70 percent of the city's surface is covered by minimally absorptive surfaces like these. This puts New York's 7,500 miles of sewer—which, if you laid it out, would stretch to California and back—under additional strain in "flash" events like the one this week.
"With further development in many parts of the city—and Brooklyn is one of them, of course—you have more paved surfaces, and so the water that comes down cannot penetrate as readily into the ground," says Klaus Jacob, a special research scientist at Columbia. "And so, you have increased runoff into the streets, and the sewer system is not able to absorb it all through the limited openings that are available. So, it accumulates on the streets and floods."
"It's not a coincidence that you had a severe heat wave followed by heavy rain."
Some cities, including New York, are taking measures to mitigate the damage of the coming floods—a longstanding factor in coastal city life that will grow worse as heavy precipitation events get heavier. The city's Department of Environmental Protection is building out and renovating the sewer system, but the department sees a better bang-for-your-buck in taking measures above ground. Building sewer or digging it up is incredibly expensive, and you also run into the basic problem of how much stuff is already occupying space underground in one of America's oldest and largest metropolises. There are pipes, sure, but also power lines and subway corridors and alligators. There are already two massive sewer lines under that Carroll Street-Fourth Avenue area, for instance, but they were absolutely overcome by the storm this week. There was just too much water.
"What we've been trying to do is learn how you can flood by design, meaning that you create spaces that can fill up with water," says Alan Cohn, the managing director of Integrated Water Management at DEP. The department has embarked on a sprawling project building "rain gardens" throughout the city—specialized sidewalk cutouts designed to take on thousands of gallons of water, thereby reducing the strain on the sewer system. That's part of a wider "green infrastructure" initiative across the city.
A "rain garden" built by the NYC DEP takes on water in a storm. Getty Images
The DEP is also exploring more cutting-edge flood-control techniques and taking cues from Copenhagen, which has jumped to lead the pack after a major cloud-burst event in 2011 where six inches of rain fell in two hours. It caused $1 billion in damage. Denmark's capital has undertaken a major initiative to revamp streets and parks to take on as much water as possible. They've even sought to use basketball courts as emergency reservoirs, storing water above or below the surface to prevent it running into the sewers all at once. New York has begun a pilot program in Queens—one of many historically underserved areas when it comes to drainage and sewage and sanitation systems—to introduce some of these ideas while simultaneously seeking some environmental justice. New York is ahead of the curve when it comes to climate-change adaptation, along with San Francisco and cities beyond our borders like Toronto, Rotterdam, and London. In the end, though, there's only so much any city can do.
"There are limits to engineered solutions no matter what," Cohn, from the DEP, says. "There will always be a threshold beyond which it will flood. So it comes down to risk tolerance, and how much we can invest in these systems."
If we do not stop pumping carbon into the atmosphere at this rate, we're bound to have a lot more weeks like this—or worse. After all, the heat wave and the rain did not arrive together by accident.
"There are limits to engineered solutions no matter what."
"It's not a coincidence that you had a severe heat wave followed by heavy rain," Sobel says. The thunderstorm feeds off the energy of the heat system ahead of it, a relationship that's independent of global warming. It's called a "compound event," Sobel notes, and "given that they often are dynamically coupled in this way, it's plausible to expect this to be a more common occurrence."
This is the first summer of the rest of our lives. It is safe to expect more extreme heat events that put severe strain on the power grid and pose a threat to public health—particularly for children, the elderly, and the infirm. It's also safe to expect some of those heat waves to be closely followed by extreme precipitation events, where the sky opens up to drown our cities. We've already seen the great Midwestern floods of 2019, and towns that lack New York's size and resources will face these conditions, too. The heat will break, but only at the cost of a flood. And then we'll do the whole thing again, over and over, and ask ourselves how we did not stand on the rooftops and scream for a stop to all this before it spiraled beyond our control. How's the weather looking this weekend?

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Why Science Needs The Humanities To Solve Climate Change

The Conversation | 

Solving the world’s climate problems will require many kinds of brain power.
UC Irvine School of Humanities, CC BY-ND
Large wildfires in the Arctic and intense heat waves in Europe are just the latest evidence that climate change is becoming the defining event of our time. Unlike other periods that came and went, such as the 1960s or the dot-com boom, an era of unchecked climate change will lead to complex and irreversible changes in Earth’s life support systems.
Many people view climate change as a scientific issue – a matter of physical, biological and technical systems. The Intergovernmental Panel on Climate Change’s most recent assessment report, for example, is a vast compendium of climate science, threats and potential solutions.
Yet modern climate change is also a human problem caused by the collective behaviors of people – mostly the wealthy – around the world. Japanese economist Yoichi Kaya summarizes this viewpoint in an elegant equation known as the Kaya Identity: Global greenhouse gas emissions are the product not just of energy use and technology, but also human population size and economic activity.
Of course, science is essential for understanding climate change, and technology is critical for solving the problem. But the IPCC report spends little more than 10 pages on climate ethics, social justice and human values. We worry that overemphasis on science may hamper the design of effective climate solutions.
In our view, solving the world’s climate problems will require tapping into brainpower beyond science. That’s why the two of us – an ecologist and a humanities dean – are teaming up to rethink climate solutions. Recently we developed a program to embed humanities graduate students in science teams, an idea that climate research centers are also exploring.


Choreographer KT Nelson discusses how she explores human responses to climate change through dance performance.

A human-centered perspective
Scholars in the humanities interpret human history, literature and imagery to figure out how people make sense of their world. Humanists challenge others to consider what makes a good life, and pose uncomfortable questions – for example, “Good for whom?” and “At whose expense?”
Going beyond science, humanists can define cultural forces driving climate change, such as the fossil fuel dependence of industrialized societies.
In her book, “Living Oil: Petroleum Culture in the American Century,” literature scholar Stephanie LeMenager asserts that 20th-century culture – novels, poetry, films, photography and television – generated a mythology of “petro-utopia.” Images of gushing oil derricks implied that the American good life meant unfettered consumption of fossil fuels.
Popular culture, land use and economics reflected this ideal, particularly in California. Even as the Golden State strives to lead the nation in combating climate change, the legacy of petro-culture endures in suburban sprawl and jammed freeways.
Humanist scholars like LeMenager help to uncover the root causes of complex problems. Yes, rising carbon dioxide levels trap more heat in the atmosphere – but values matter too. Defining features of American identity, such as independence, freedom, mobility and self-reliance, have become entangled with petroleum consumption.


Car culture in the United States has affected land use, travel patterns, retail trends and many other features of American life.

The softer side of technology
When thinking about climate solutions, people often picture technical fixes. The IPCC reports list many ideas for climate change mitigation and adaptation. Mitigation reduces greenhouse gas emissions through technologies like renewable energy. Adaptation, such as building sea walls, aims to manage climate change impacts. It also includes schemes to engineer Earth’s climate system – for example, releasing chemicals into the stratosphere to reflect sunlight back into space.
In principle, scientists and engineers could deploy any of these fixes. But should they? To answer this question, society needs humanists and their “soft” technologies – intangible tools for solving problems based on nonscientific knowledge.
Cultural scholars and philosophers can inject ethical principles into policymaking. Relative to emissions reductions, expensive adaptation schemes are less likely to benefit indigenous populations, future generations and the poor – the groups that are most vulnerable to climate change.
Humanists can also help decision makers see how history and culture affect policy options. Plans to improve fuel economy will need to address the historical bond between petroleum and personal freedom. Alternatively, humanity could keep burning fossil fuels while trying to capture the emissions. Yet some societies might balk at the high costs of relatively unproven carbon capture technologies.


Three scholars offer conflicting views on geoengineering as an acceptable response to climate change.

Aligning climate solutions with human values
So far, scientific facts have not motivated Americans to support the huge societal transformations needed to stop climate change. Some reject the scientific consensus on global warming because it makes them feel bad or clashes with their personal experience of the weather.
Climate change matters more when it affects people’s homes, livelihoods and spiritual beliefs. Recent protests against the Dakota Access Pipeline are an example. Opponents condemned the desecration of Native American burial sites and called out violations of historical land treaties dating back 150 years. To them, the pipeline was not just a source of greenhouse gases. It was a threat to their ideals and spirituality.
By tapping into what moves people, the emerging field of environmental humanities can help spur climate action. Scholars of history, philosophy, religious studies, literature and media are exploring many aspects of humans’ relationship with the Earth. An entire literary genre of climate fiction, or “Cli-Fi,” depicts often-apocalyptic visions of climate impacts on humanity. Social scientists have worked out how civilizations like the ancient Maya and medieval Icelanders dealt with climate shocks.
Together with scientists, environmental humanists are reforming scenarios used in climate modeling. Scenarios originated as an improvisational form of theater, and humanists are reclaiming them as a rehearsal space for the massive societal shifts required to avert dangerous climate change.

Uniting humanists and scientists
We think that stronger collaborations across the humanities and sciences are key for effective climate solutions. Still, there are hurdles to overcome. Humanists have been criticized for failing to apply their expertise to environmental problems outside academic circles. For their part, scientists need to respect humanists as scholars in their own right, not just clever translators of hard science.
In our view, it’s time for scientists, engineers and humanists to break down these barriers and appreciate the human element of global climate change.

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