A feature of many civilisations has been massive public works to store, distribute and divert water; it goes with the territory that such works have to be maintained over the course of centuries and the record shows that this has indeed been the case in e.g. India, China, Morocco. Intentional long-term climate intervention is merely (!) as it were the same scenario in modern dress--yes, its going to be very complicated and very messy and may well turn nasty from time to time-- but the alternative is a more or less total breakdown of human society. It's a hard road but the one we have to take.
On Dec 18, 3:30 pm, Dan Whaley <[email protected]> wrote: > Opinion > Resisting the Dangerous Allure > of Global Warming Technofixes > As the world weighs how to deal with warming, the idea of human > manipulation of climate systems is gaining attention. Yet beyond the > environmental and technical questions looms a more practical issue: > How could governments really commit to supervising geoengineering > schemes for centuries? > by dianne dumanoski > > In the summer of 2006, geoengineering — the radical proposal to offset > one human intervention into planetary systems with another — came > roaring out of the scientific closet. Deliberate climate modification, > as climate scientist Wally Broecker once noted, had long been “one of > the few subjects considered taboo in the realm of scientific inquiry.” > > Two things spurred this dramatic reversal: growing alarm because > climate change was hitting harder and faster than expected and the > abysmal failure of political efforts to reduce carbon dioxide > emissions. Indeed, since world leaders signed the Rio Convention on > Climate Change in 1992, global emissions climbed from 6.1 billion > metric tons of carbon a year to 8.5 billion tons in 2007. Dismayed by > the inaction, Paul Crutzen, a Nobel laureate, published a > controversial paper in August, 2006 that opened the door to the > hitherto unthinkable. Since timely and sufficient reductions appeared > to be, in his words, “a pious wish,” he urged serious investigation of > technological proposals to offset rising temperatures. > > For some, geoengineering seemed to hold out another hope: that > technology might provide an escape not only from growing heat, but > also from the thorny realm of hard choices and difficult international > politics. Those politics were on vivid display in Copenhagen this > week, as nations have agreed on the gravity of the threat but little > else. > > Since the release of Crutzen’s influential paper, many have voiced > concerns about possible hazards posed by geoengineering schemes. For > example, the artificial volcano projects, which would inject sulfate > particles into the stratosphere to deflect incoming sunlight, might > reduce the symptom of excess heat, but experience from past volcanic > eruptions and climate > > The moral and political hazards of geoengineering are as > formidable as the physical dangers. > > models indicates that this approach would likely alter rainfall > patterns and intensify drought in many regions. And because such > sunshade schemes only treat a symptom rather than tackle the cause, > this technofix would do nothing to prevent another dire consequence of > rising levels of carbon dioxide in the atmosphere — increasing acidity > in ocean waters. This acidity jeopardizes coral reefs, shelled marine > life, and a tiny plankton Emiliania huxleyi, which plays a key role in > the transfer of carbon from the atmosphere to long-term storage in > deep ocean sediments. > > But the biggest hitch in sunshade remedies involves politics and > questions of governance, for they would require an unflagging > commitment of centuries: five hundred years or so, or, if we do not > make major emissions cuts, even as long as a millennium. If anything > were to interrupt this geoengineering effort, which would have to keep > replenishing the sulfates every few years, the world would quickly > confront a doomsday scenario: Temperatures would suddenly soar upward > at a rate 20 times faster than they are rising today, causing > unimaginable havoc in human and natural systems and with it, the real > danger of human extinction. This institutional challenge is without > question a far greater obstacle than any technological difficulties. > It is hard to imagine that anyone with even a passing knowledge of > human history would think this long-term commitment could be a prudent > gamble. > > The moral and political hazards of geoengineering are altogether as > formidable as the physical dangers. However inviting the prospects > shimmering on the technological horizon, geoengineering “solutions” > and the promise of a technofix down the road lead us easily into > temptation. Indeed, these speculative technologies are already > figuring in the political debate and hover in the background of > diplomatic discussions, since it will be impossible to limit future > warming to 2 degrees C, as G-8 leaders pledged in July, without > something like a new technology to suck carbon dioxide from the > atmosphere. It is easy to forget that these are proposals, not proven > technologies. There is no assurance that any will actually work as > imagined. > > Even more troubling, these tantalizing prospects can encourage neglect > of what can be done now. Former President George W. Bush often used > future technology as an excuse for inaction, touting research on > hydrogen > > Cloud Ships > University of Edinburgh > CLICK TO ENLARGE: In one geoengineering scheme, scientists are > studying the idea of ships that would spray droplets of saltwater into > the atmosphere, making cloud cover thicker and whiter, thus reflecting > more sunlight back into space. > fuel-cell “freedom cars” while rejecting proposals to improve the > efficiency of today’s vehicles. One energy economist quipped, the > freedom car “is really about Bush’s freedom to do nothing about cars > today.” > > Similarly, longtime climate skeptic Bjorn Lomborg claims that the > best, most cost-effective approach isn’t any of the policy proposals > on the table in the U.S. Congress or at the Copenhagen conference — > for instance, carbon taxes or a regime of cap-and-trade — but rather > one of the sunshade technologies that would boost the cooling capacity > of clouds by spraying saltwater into the air to stimulate the > formation of more cloud droplets. > > If Lomborg and his allies in conservative think tanks tout such > technofixes as a better “solution” to the climate change, others such > as Crutzen and Ralph Cicerone, president of the National Academy of > Sciences, see it as an insurance policy in the event of full-blown > emergency. They advocate research to distinguish the merely risky > geoengineering schemes from the manifestly mad. It is hard to object > to a backup plan, especially as the world has not yet halted > emissions, much less embarked on the deep reductions that are > required. > > Insurance, however, often has a perverse effect: The promise that > something will be there to bail you out if the worst happens > encourages imprudent behavior. The number of mountain rescues has > increased > > The promise that something will bail you out if the worst happens > encourages imprudent behavior. > > because hikers carry cell phones. The National Flood Insurance Program > for people living in coastal communities aimed to discourage > development in high-risk areas by providing subsidized insurance if > the local government agreed to guide development away from flood-prone > areas, but the program instead has increased development in these > danger zones. Similarly, geoengineering schemes foster the notion that > technology can rescue us from climate hell, if it comes to that, and > thereby discourages early, prudent action to head off the worst > danger. > > The political hazards of deliberate planetary manipulation are as > formidable as the moral pitfalls. The technologies that scientists and > engineers regard as “insurance” to safeguard the human future may > precipitate new kinds of international conflict and the possibility of > an arms race in geoengineering technology. > > If geoengineering becomes the chosen response, the obvious question > is, Who is going to make decisions that are truly global in scope, and > how? Who, if anyone, will be approving, overseeing, and policing any > use of geoengineering? If the time comes when the Earth needs a > sunshade, there must be a guarantee, once started, that it will > continue for centuries. If the monsoon fails following some > geoengineering effort, there must be some authority to mediate the > dispute about what caused it or compensate those who claim damages. As > Stanford climate scientist Stephen Schneider has suggested, such > claims are inevitable, so it would be unwise to do this without some > plan for “no-fault climate disaster insurance” to provide > compensation. > > And how is it going to be possible to distinguish plain old bad > weather from climatological warfare? In a geoengineered world, a > catastrophic hurricane or devastating drought can generate suspicion, > paranoia, and conflict. > > The problems of the planetary era clearly require some manner of > global governance, but our first attempts at this have failed > miserably. Gus Speth, > > What happens if a single country opts for planetary manipulation > instead of reducing emissions? > > the former dean of the Yale School of Forestry & Environmental Studies > and an early leader on global problems, describes the current state of > affairs bluntly: “The climate convention is not protecting climate, > the biodiversity convention is not protecting biodiversity, the > desertification convention is not preventing desertification, and even > the older and stronger Convention of the Law of the Sea is not > protecting fisheries.” > > The planetary system binds us more tightly in a common destiny than > the economic system. No one will be secure in a world with runaway > warming. Yet governments that willingly concede some of their > sovereignty to promote economic expansion will not do the same to > protect planetary systems. > > In the absence of some means to arrive at a collective decision and > provide oversight, all sorts of conflicts and tensions are almost > inevitable. What happens if a single country decides to opt for > planetary manipulation instead of reducing its emissions? What if > other countries object that the project is too risky? If it becomes > possible to scrub carbon dioxide from the air and reduce carbon > dioxide levels, the question of who gets to choose what kind of > climate we want and whether nations should pay to remove their share > of past emissions could spark serious disputes. > > More from Yale e360 > Geoengineering the Planet: > The Possibilities and Pitfalls > In an interview with Yale Environment 360, climate ... > > read more » -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
