  {"id":28638,"date":"2024-11-05T00:01:00","date_gmt":"2024-11-05T06:01:00","guid":{"rendered":"https:\/\/uwm.edu\/letters-science\/?p=28638"},"modified":"2024-11-04T21:52:40","modified_gmt":"2024-11-05T03:52:40","slug":"engineering-an-agreement-uwm-economist-plans-for-future-climate-change-agreements-with-emerging-technology","status":"publish","type":"post","link":"https:\/\/uwm.edu\/letters-science\/in-focus-2024\/engineering-an-agreement-uwm-economist-plans-for-future-climate-change-agreements-with-emerging-technology\/","title":{"rendered":"Engineering an agreement: 51ÁÔÆæ economist plans for future climate change agreements with emerging technology"},"content":{"rendered":"\n<p>Solar geoengineering (SGE) is an emerging technology that has the potential to help cool our warming earth. It works quickly, it\u2019s cheap, and it can cool large areas of the globe.<\/p>\n\n\n\n<p>It\u2019s also an addictive Band-Aid with long-term consequences that are not fully understood..<\/p>\n\n\n\n<p>Matthew McGinty, a professor of economics at 51ÁÔÆæ, is a co-author of a recent paper published in the\u00a0<a href=\"https:\/\/nam02.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fwww.journals.uchicago.edu%2Fdoi%2Fabs%2F10.1086%2F728140%3FjournalCode%3Djaere&amp;data=05%7C02%7Csvickery%40uwm.edu%7C0353066ee28c46aafcfa08dcf9adfba6%7C0bca7ac3fcb64efd89eb6de97603cf21%7C0%7C0%7C638659772874962315%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=1A6DfIMofjmlKb2t3AsS96FApx4%2Fd6KLQ7FX7%2FDMtDY%3D&amp;reserved=0\"><em>Journal of the Association of Environmental and Resource Economists<\/em><\/a>. In it, he and his collaborators explore the possibility that a single nation, called a \u2018free driver,\u2019 begins to use SGE to cool the planet.<\/p>\n\n\n\n<p>The paper examined voluntary climate change agreements between nations and looked at them as a series of questions: Do they want to participate in an agreement, like the <a href=\"https:\/\/unfccc.int\/process-and-meetings\/the-paris-agreement\">Paris Accords<\/a> or the <a href=\"https:\/\/unfccc.int\/kyoto_protocol#:~:text=In%20short%2C%20the%20Kyoto%20Protocol,accordance%20with%20agreed%20individual%20targets.\">Kyoto Protocol<\/a>? How much should they choose to reduce emissions by? Can the nations form a coalition? Then, the authors added another scenario: What if countries had the option to implement solar geoengineering?<\/p>\n\n\n\n<p>\u201cWhat we show is that you can actually \u2018crowd in\u2019 emissions if the threat of this free driver is out there, and you can be damaged by them doing too much geoengineering,\u201d McGinty explained. \u201cIf one nation uses it, it could harm other nations.\u201d<\/p>\n\n\n\n<p>Here are three things you need to know about McGinty\u2019s research and SGE.<\/p>\n\n\n\n<h2 class=\"wp-block-heading size-h4\"><strong>1.<\/strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>Solar geoengineering is a Band-aid, not a solution.<\/strong><\/h2>\n\n\n\n<p>SGE is still 5-10 years from being realized, but McGinty and other researchers know that it\u2019s coming, and it needs to be studied.<\/p>\n\n\n\n<p>SGE refers to a spate of technologies that reflect the sun\u2019s energy away from the Earth\u2019s surface, thereby cooling the temperature. These include methods like covering rooftops in reflective paint or placing large mirrors in orbit around the planet. But the most cost-effective technology, and therefore most likely to be implemented, is called stratospheric aerosol injection (SAI). That involves using airplanes to distribute particulates into the upper atmosphere, mimicking a natural cooling phenomenon that scientists observed when a volcano erupted in the Philippines in 1991. The fine particles that spewed into the air caused a .5 degrees Celsius cooling effect around the world over the next year.<\/p>\n\n\n\n<p>SAI is also inexpensive, costing as little as $20 billion per year when other mitigation strategies cost in the trillions of dollars.<\/p>\n\n\n\n<p>But there are pitfalls \u2013 namely, SGE does not address the emission of greenhouse gases like carbon dioxide. While SGE would cool the earth, greenhouse gases would continue to be emitted, and other consequences, like the acidification of the oceans, would still occur.<\/p>\n\n\n\n<p>Also, SGE is a short-term solution. The cooling effect would last for a year or two at best, and then SAI particulates would have to be \u201cre-upped\u201d every so often to achieve the effect again.<\/p>\n\n\n\n<p>\u201cSo, once you start to use this technology, it becomes addictive,\u201d said McGinty. \u201cIf you stop, you could have a massive rebound in temperature.\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading size-h4\"><strong>2. There are no international climate agreements in place that include SGE, and anyone could start using it.<\/strong><\/h2>\n\n\n\n<p>McGinty studies international climate agreements, particularly through the lens of game theory. Game theory assumes that nations, despite their promises, will ultimately act in their own self-interest. While climate agreements like the Paris Accords say that countries pledge to reduce their emissions to achieve specific targets on a set timeline, they are non-binding and there are no ramifications if countries fail to meet their goals.<\/p>\n\n\n\n<p>The paper posed the question: What would happen if any of those countries decided to use SGE on their own?<\/p>\n\n\n\n<p>This is what McGinty and his co-authors refer to as the \u2018free driver\u2019 problem. In economics, a \u2018free rider\u2019 is a person or entity that benefits from the actions of another without putting in work themselves. In a climate agreement, a free rider is any nation that does not contribute to climate change mitigation efforts, but nevertheless enjoys the benefits of those efforts.<\/p>\n\n\n\n<p>A free driver would be the opposite: An entity or nation that takes on the individual task to reap individual benefits without regard for others. The countries that have the means to deploy these technologies would likely be the United States, China, or Russia, but a rogue nation state like North Korea or even an individual billionaire could decide to implement them, given how inexpensive SGE is.<\/p>\n\n\n\n<p>And that could be bad news for the rest of the planet. \u201cPotentially, it\u2019s going to change global precipitation patterns. There are unknown long-term side effects,\u201d McGinty warned.<\/p>\n\n\n\n<p>Countries could try to curb a free driver by imposing sanctions or embargoes on the rogue actor, but that wouldn\u2019t be enough to stop SGE. \u201cIf you were even to pay money or embargo or stop one driver, the next driver emerges,\u201d McGinty pointed out. \u201cYou can\u2019t sanction all of (them).\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading size-h4\"><strong>3. Despite consequences, SGE may inspire initiatives to lower greenhouse gas emissions.<\/strong><\/h2>\n\n\n\n<p>It all goes back to game theory. McGinty thinks the fear that a rogue state or individual could deploy SGE technology outside of the framework of a climate agreement could be enough to encourage nations to begin cutting their emissions.<\/p>\n\n\n\n<p>\u201cThat\u2019s the underlying takeaway from our paper. \u2026 We call it an \u2018anti-driver\u2019 effect. If the damages from the free driver using too much geoengineering are too high, then you protect yourself by reducing your emissions so they don\u2019t use it,\u201d McGinty explained.<\/p>\n\n\n\n<h2 class=\"wp-block-heading size-h4\"><strong>Hypotheticals and reality<\/strong><\/h2>\n\n\n\n<p>Why plan for these hypothetical scenarios? SGE is still 5-10 years away, and global relationships and the climate itself are always in flux.<\/p>\n\n\n\n<p>But McGinty thinks that if SGE is part of the future, we need to start planning for it now.<\/p>\n\n\n\n<p>\u201cThe question becomes, who gets to decide where the global thermostat is set, and are we going to have an agreement on that?\u201d McGinty said. \u201cIf we can understand the individual incentives, then we can think about how to design an agreement that people can join. \u2026 It also tells us that if this technology is out there, then maybe that can lead us to agreements where we actually do solve the underlying problem of emissions.\u201d<\/p>\n\n\n\n<p>Until then, McGinty and his colleagues will continue their research. Scientists and governments can\u2019t afford to ignore solar geoengineering, and McGinty worries that the day is coming when his hypotheticals will be all too real.<\/p>\n\n\n\n<p><strong><em>By Sarah Vickery, College of Letters &amp; Science<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Solar geoengineering (SGE) is an emerging technology that has the potential to help cool our warming earth. It works quickly, it\u2019s cheap, and it can cool large areas of the globe. It\u2019s also an addictive Band-Aid with long-term consequences that &hellip;<\/p>\n","protected":false},"author":785,"featured_media":28639,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","uwm_wg_additional_authors":[]},"categories":[1648,1945,1846],"tags":[1861],"class_list":["post-28638","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-in-focus","category-in-focus-2024","category-research-news","tag-november"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Letters &amp; Science<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uwm.edu\/letters-science\/in-focus-2024\/engineering-an-agreement-uwm-economist-plans-for-future-climate-change-agreements-with-emerging-technology\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Engineering an agreement: 51ÁÔÆæ economist plans for future climate change agreements with emerging technology\" \/>\n<meta property=\"og:description\" content=\"Solar geoengineering (SGE) is an emerging technology that has the potential to help cool our warming earth. 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