Injecting sulfate aerosols into the stratosphere could quickly offset global warming caused by anthropogenic greenhouse gas emissions. Because the technology would have global side effects, it raises not only technological but also political, ethical, and social concerns. Therefore, research on sulfate injection should be accompanied by a global debate that incorporates public perceptions and concerns into the development and governance of the technology. Our paper provides insight into public perceptions and explores their underlying patterns using a survey conducted in Germany. The data reveal a differentiated picture. Laboratory research on sulfate injection is broadly approved, whereas field research is much less approved. Immediate deployment is largely rejected. The acceptance of the technology is associated with the belief that climate change is a serious problem and that humans will eventually be able to control nature. It is also determined by the levels of trust in scientists and firms. Among the strongest objections against the technology is the belief that humans should not manipulate nature in the way injecting sulfate would. The actual public perceptions of sulfate injection will, however, evolve along with the ongoing debate between the public, experts, and policymakers.
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The German video together with the accompanying transcript in English is provided in the online appendix.
The video initially described sulfate injection as ′spraying sulfate particles into the atmosphere at high altitude′ to reflect sunlight. When subsequently referring to the technology, both the video and the survey used the term ′solar radiation management′ or the abbreviation ′SRM′.
Respondents with a higher education entrance certificate were coded as having a high level of education in the analysis.
Respondents were not able to skip or fast forward the video.
The connotation of the German expression for taking the too easy way out is that sulfate injection cannot be right; taking the too easy way out is considered to shirk one′s responsibility or to be thoughtless.
Summary statistics are available in table A-2 in the online appendix.
Results of this robustness check are presented in table A-3 in the online appendix.
Barrett S (2008) The incredible economics of geoengineering. Environ Resour Econ 39:45–54
Bellamy R, Hulme M (2011) Beyond the tipping point: understanding perceptions of abrupt climate change and their implications. Weather Clim Soc 3:48–60
Borick C, Rabe B (2012) Americans cool on geoengineering approaches to addressing climate change. Issues Gov Studies 46
Bostrom A et al (2012) Causal thinking and support for climate change policies: international survey findings. Glob Environ Chang 22:210–222
Buck, HJ (2010) What can geoengineering do for us? Public participation and the new media landscape. http://umt.edu/ethics/ethicsgeoengineering/Workshop/articles1/Holly%20Buck.pdf
Carr, WA (2014) This is God’s stuff we’re messing with: Geoengineering as a religious issue. Geoengineering Our Clim Working Paper and Opin Article Ser. http://wp.me/p2zsRk-aT
Carr WA, Preston CJ, Yung L et al (2013) Public engagement on solar radiation management and why it needs to happen now. Clim Chang 121(3):567–577
Corner A, Parkhill K, Pidgeon N et al (2013) Messing with nature? Exploring public perceptions of geoengineering in the UK. Glob Environ Chang 23(5):938–947
Corner A, Pidgeon N, Parkhill K (2012) Perceptions of geoengineering: public attitudes, stakeholder perspectives, and the challenge of ‘upstream’ engagement. Wirel Clim Chang 3(5):451–466
Corner A, Pidgeon N (2014) Like artificial trees? The effect of framing by natural analogy on public perceptions of geoengineering. Clim Chang. doi:10.1007/s10584-014-1148-6
Crutzen P (2006) Albedo enhancement by stratospheric sulfur injections: a contribution to solve a policy dilemma? Clim Chang 77:211–219
Dohmen T, Falk A, Huffman D et al (2011) Individual risk attitudes: Measurement, determinants, and behavioral consequences. J Eur Econ Assoc 9(3):522–550
Dunlap RE, van Liere KD, Mertig AG et al (2000) New trends in measuring environmental attitudes: measuring endorsement of the new ecological paradigm: a revised NEP scale. J Soc Issues 56(3):425–442
Earle TC (2010) Trust in risk management: a model-based review of empirical research. Risk Anal 30:541–574
European Commission (2011) Public awareness and acceptance of CO2 capture and storage. Special Eurobarometer 364. http://ec.europa.eu/public_opinion/archives/ebs/ebs_364_en.pdf
Hansen A (2006) Tampering with nature: ‘nature’ and the ‘natural’ in media coverage of genetics and biotechnology. Media Cult Soc 28:811–834
IPCC (2013) Summary for policymakers. In: Climate change 2013: The physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge
IPCC (2012) Meeting report of the Intergovernmental Panel on Climate Change expert meeting on geoengineering. IPCC Working Group III Technical Support Unit, Potsdam Institute for Climate Impact Research, Potsdam
IPCC (2007) Summary for policymakers. In: Climate change 2007: The physical science basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge
Kahan D, Jenkins-Smith H, Tarantola T, Silva CL, Braman D (2012) Geoengineering and the science communication environment: a cross-cultural experiment. Cultural Cognition Working Paper 92. Yale Law School, New Haven
Leiserowitz A, Maibach E, Roser-Renouf C et al (2012) Climate change in the American mind: Americans′ global warming beliefs and attitudes in March 2012. Yale University and George Mason University, New Haven, Yale Proj on Clim Chang Comm. http://environment.yale.edu/climate/files/Climate-Beliefs-March-2012.pdf
Macnaghten P, Szerszynski B (2013) Living the global social experiment: an analysis of public discourse on solar radiation management and its implications for governance. Glob Environ Chang 23(2):465–474
Marquart-Pyatt S (2012) Contextual influences on environmental concerns cross-nationally: a multilevel investigation. Soc Sci Res 41(5):1085–1099
Mercer AM, Keith DW, Sharp JD (2011) Public understanding of solar radiation management. Environ Res Lett 6(4):1–9
Pidgeon N, Corner A, Parkhill K et al (2012) Exploring early public responses to geoengineering. Philos Trans R Soc 370:4176–4196
Pidgeon N, Parkhill K, Corner A et al (2013) Deliberating stratospheric aerosols for climate geoengineering and the SPICE project. Nat Clim Chang 3:451–457
Rayner S, Redgwell C, Savulescu J, Pidgeon N, Kruger T (2009) Memorandum on draft principles for the conduct of geoengineering research. http://www.geoengineering.ox.ac.uk/oxford-principles/history/
Rickels W, Klepper G (2012) The real economics of climate engineering. Econ Res Intern 2012
Rickels W et al (2011) Large-scale intentional interventions into the climate system? Assessing the climate engineering debate. Scoping report conducted on behalf of the German Federal Ministry of Education and Research (BMBF). Kiel Earth Institute, Kiel
Robock A (2008) 20 reasons why geoengineering may be a bad idea. Bull At Sci 64(2):4–18
Robock A, MacMartin DG, Duren R et al (2013) Studying geoengineering with natural and anthropogenic analogs. Clim Chang 121(3):445–458
Robock A, Oman L, Stenchikov G (2008) Regional climate responses to geoengineering with tropical and arctic SO2 injections. J Geophys Res 113(D16101)
Royal Society (2009) Geoengineering the climate: Science, governance and uncertainty. The Royal Society, London
Spence A, Venables D, Pidgeon N, Poortinga W, Demski C (2010) Public perceptions of climate change and energy futures in Britain. Understanding Risk Working Paper 10-01. School of Psychology, Cardiff
SRMGI (2011) Solar radiation management: The governance of research. Environmental Defense Fund, The Royal Society, TWAS. http://www.srmgi.org/files/2012/01/DES2391_SRMGI-report_web_11112.pdf
Sugiyama M, Fujiwara M (2012) Public perception of climate engineering in Japan: Results from online and classroom surveys. mimeo
US GAO (2011) Climate engineering: Technical status, future directions, and potential responses. GAO-11-71. Government Accountability Office, Washington
Victor DG (2008) On the regulation of geoengineering. Oxf Rev Econ Policy 24(2):322–336
Virgoe J (2009) International governance of a possible geoengineering intervention to combat climate change. Clim Chang 95(1):103–119
WVS (2013) Values surveys database, wave 2005-2008. http://www.wvsevsdb.com/wvs/WVSAnalize.jsp
This paper is part of the project ACCEPT which is funded by the German Federal Ministry for Education and Research (grant number 01LA1112A). We would like to thank three anonymous reviewers, Ashley Mercer, Nick Pidgeon, Andreas Oschlies, Gernot Klepper, Wilfried Rickels, Dorothee Amelung, and Timo Goeschl for their helpful comments and suggestions. We also thank participants of an IASS seminar, the Oxford Summer School on Geoengineering Research, and research seminars in Kiel. Furthermore, we want to thank Swantje Sundt for valuable research assistance.
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Slide 1 Sunlight warms the Earth and the Earth’s atmosphere. Greenhouse gases in the atmosphere, such as CO2, ensure that a certain amount of heat remains close to the Earth’s surface. This makes the Earth warm enough for humans, animals, and plants to survive.
Slide 2 Since the beginning of industrialization around the year 1850, humans have emitted large amounts of greenhouse gases, for example, by burning coal, oil, and gas. These gases trap additional heat in the atmosphere and cause a gradual increase in the average global temperature.
Slide 3 – 8 Since 1900, the global temperature has risen on average by approximately 0.8°C. Almost all countries agree that the increase in the average global temperature should not exceed 2°C compared to the temperature at the beginning of the industrialization. This is referred to as the 2°C goal. A future temperature increase between 0.9°C and 5.4°C is expected by 2100. The outcome depends especially on the amount of greenhouse gases emitted in the future. To reach the 2°C goal, the current level of emissions would have to decrease by more than half by 2050. By 2100, almost no greenhouse gases should be emitted.
Slide 9 Climate change will almost certainly cause a rise in sea levels. It is very likely that both the frequency of heat waves and the number of heavy precipitation events will increase in many regions. In the future, it is likely that more areas will be affected by longer droughts and that the frequency and the intensity of tropical cyclones will increase. In addition, because oceans absorb some of the CO2 in the atmosphere, they will become more acidic.
Slide 10 There are different ways to deal with climate change: We can reduce greenhouse gas emissions or adapt to the new climate – for example, by building dikes or using more robust plants in agriculture. Another option is to reduce the global temperature by deploying solar radiation management (SRM).
Slide 11 Through SRM, a portion of the sunlight is reflected before it can warm the Earth. This can be achieved by, for example, spraying sulfate particles into the atmosphere at a high altitude. A similar phenomenon is observed in nature. When large volcanoes erupt, similar particles are distributed across wide areas of the Earth’s atmosphere, which cools the Earth.
Slide 12 The particles remain in the higher regions of the atmosphere for about two years. To prevent the Earth from heating up again, spraying would have to be continued until the cause of global warming is removed. Because the emitted CO2 stays in the atmosphere for a very long time, SRM might have to be used for several centuries. Ocean acidification will not be halted by using SRM. However, the 2°C goal could be met regardless of future greenhouse gas emissions by deploying SRM. Currently, researchers are investigating the risks, benefits, and feasibility of SRM.
Slide 13 The use of SRM entails benefits as well as risks. One benefit is that global warming might be slowed more quickly compared to cutting greenhouse gas emissions. This would provide mankind with additional time to remove the cause of climate change, i.e., the high concentration of greenhouse gases in the atmosphere. Massive and irreversible changes in the climate could be stopped before too much damage is done. Furthermore, it would be possible to stop climate change even if certain countries refused to reduce their greenhouse gas emissions. Deploying SRM would be cheaper than reducing the consumption of fossil fuels.
Slide 14 The risks include a change in the amount of precipitation in most regions. In particular, arid regions would have to cope with even less rain. If the deployment of SRM were suddenly halted, the global temperature would rise abruptly. The speed of this temperature rise might lead to severe problems for humans and the environment. Because possible side effects would occur across international boundaries, the use of SRM might cause international conflicts. Once used, SRM might take away people’s motivation to change their lifestyle and the emission of greenhouse gases would continue to increase. Furthermore, there would be the threat of other unknown and unforeseeable risks.
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Merk, C., Pönitzsch, G., Kniebes, C. et al. Exploring public perceptions of stratospheric sulfate injection. Climatic Change 130, 299–312 (2015) doi:10.1007/s10584-014-1317-7
- Risk Aversion
- Online Appendix
- Public Perception
- Slippery Slope
- Governance Framework