Stabilization Wedge Game

The "Stabilization Wedge Game", or what is commonly referred to as simply the 'Wedge Game', is a serious game produced by Princeton University's Carbon Mitigation Initiative. The goal of the game creators, Stephen Pacala and Robert H. Socolow, is to demonstrate through this game that global warming is a problem which can be solved by implementing today's technologies to reduce CO2 emissions. The object of the game is to keep the next fifty years of CO2 emissions flat, using seven wedges from a variety of different strategies which fit into the stabilization triangle.

Concept

Scenario

Emissions of CO2 and other greenhouse gases have been increasing ever since the Industrial Revolution, and if the world continues business as usual, emissions will double by 2055. To prevent the worst consequences of global warming, scientists recommend freezing and reducing net global emissions immediately.

Stabilization Triangle

If global emissions of CO2 are graphed for the next 50 years, the difference between the business as usual scenario and the flat path forms a triangle. This triangle is known as the stabilization triangle. Pacala and Socolow divided this hypothetical triangle into seven stabilization wedges, which represent different measures that must be taken to reduce emissions. When speaking of different strategies to reduce emissions, the language "to reduce one wedge's worth," is often employed, and by reducing the stabilization wedge of fourteen gigatons of CO2 into seven wedges, the task is much easier to conceptualize.citeweb|url=http://www.princeton.edu/wedges/Stabilization_Wedges_Game_w8_Oct07.pdf|title=Stabilization Wedges: A Concept & Game|last=Hotinski|first=Roberta|publisher=Carbon Mitigation Initiative|date=2007-01|accessdate=2007-07-20]

Wedge Strategies

As Pacala and Socolow originally presented the wedges concept in "Science", there are fifteen different wedge strategies.citeweb|url=http://www.sciencemag.org/cgi/content/full/305/5686/968?ijkey=Y58LIjdWjMPsw&keytype=ref&siteid=sci|title=Stabilization Wedges: Solving the Climate Problem for the Next 50 Years with Current Technologies|author=Stephen Pacala|coauthors=Robert Socolow|publisher="Science"|date=2004-08-13|accessdate=2007-08-20] Regarding the specific number, Socolow says that he and Pacala didn't include all of the possibilities, but that "It was a matter of rhetoric to stop at 15. And exhaustion. There was nothing magic about 15." On the CMI website, the same strategies are presented and expanded upon in detail, and are re-organized into four categories:
#Efficiency (4 strategies)
#Decarbonization of power (5 strategies)
#Decarbonization of fuel (4 strategies)
#Forest and agricultural soils (2 strategies)citeweb|url=http://www.princeton.edu/~cmi/resources/wedgesumtb.htm|title=Wedge Summary Table|publisher=Carbon Mitigation Institute|date=2006-07-31|accessdate=2007-08-20]

Uses

Because of the simplicity of the wedge game, it has become popular as a communication tool for global warming mitigation. It is used in a variety of arenas and by a variety of players including businessmen, politicians, teachers, and students. David Hawkins, climate director at the Natural Resources Defense Council, puts the ease of use of the Wedge Game this way:

Education

The Carbon Mitigation Initiative (CMI) permits anyone to use the game and make use of their materials, provided that they share the results with CMI. Because it is so widely accessible, it has become included in certain high school curricula. The Keystone Center has deemed the "Stabilization Wedge Game" to fulfill the following National Education Standards: S1, S6, LA4, LA5, C4, C5, E1, G1, G5, and WH9. [citeweb|url=http://www.keystonecurriculum.org/highschool/week4/lesson_18.html|title=CSI: Climate Status Investigations (grades 9-12)|publisher=The Keystone Center|accessdate=2007-08-16]

The American Association for the Advancement of Science hosted a conference for educators at the Hilton in San Francisco 2007-02-18. Collaborating with AAAS were the National Science Teachers Association and the United Educators of San Francisco (representing the National Education Association and the American Federation of Teachers). Dr. Socolow and Dr. Hotinski personally presented the Stabilization Wedge concept at the event. [citeweb|url=http://www.aaas.org/news/press_room/climate_change/media/ccth_program.pdf|title=Communicating and Learning About Global Climate Change|publisher=American Association for theAdvancement of Science|accessdate=2007-08-17]

Business

The "Stabilization Wedge Game" is also used as a centerpiece for business seminars. Business executives played the game at as seminar held by the Sustainable Enterprise Academy at York University in Toronto. [citeweb|url=http://www.npr.org/templates/story/story.php?storyId=11253361|title=Climate Game Gives Real Options to Save World|first=Nell|last=Boyce|publisher=National Public Radio|date=2007-06-25|accessdate=2007-08-16]

Criticism

The primary critique of the Wedge Game is that it is too simple, especially regarding the economic aspect of global warming mitigation. The materials provided by CMI only attach one, two, or three dollar signs to each wedge as a broad estimate of the expense of each option.. Jim Connaughton, chairman of the White House Council on Environmental Quality, is a critic of the Wedge Game for its oversimplicity, and he has even said that some of the numbers used by Socolow and Pacala, such as 550 ppm as a maximum allowable target for CO2, lack a scientific basis. Richard G. Richels, a senior engineer at the Electric Power Research Institute, says that the lack of economic precision in the game could create misconceptions:

Another criticism of the game is that one of the premises, i.e. that humanity already has the tools and technologies to halt climate change, is misleading. [citeweb|url=http://www.worldchanging.com/archives/003861.html|title=Stabilization Wedges:Comments|author=Arthur Smith|date=2005-12-15|accessdate|2007-08-20] Marty Hoffert of the New York University Physics Department claims that while the technologies are available in a technical sense, they are not available in an operational sense, and it will take a massive mobilization to make progress. Hoffert explains:

In June 2008, Joseph Romm argued in"Nature" magazine that "If we are to have confidence in our ability to stabilize carbon dioxide levels below 450 p.p.m. emissions must average less than 5 GtC per year over the century. This means accelerating the deployment of the... wedges so they begin to take effect in 2015 and are completely operational in much less time than originally modelled by Socolow and Pacala." [ [http://www.nature.com/climate/2008/0807/full/climate.2008.59.html Romm, Joseph. "Cleaning up on carbon",] June 19, 2008]

Sources