Coverage of the Call for Balance 

The Geoengineering Question Co-authors of the Call for Balance in Project Syndicate, Sept 11, 2023.

Should We Research Geoengineering? Peter Singer in Project Syndicate, Apr 12, 2023.

Plädoyer für mehr Forschung zu Klimaeingriffen. Der Standard (AT), March 26, 2023.

Kunnen kunstmatige vulkanen de opwarming van de aarde stoppen? NRC Vandaag News (NL), March 22, 2023.

Een technofix voor het klimaat onderzoeken is gevaarlijk. Of is het juist nodig? NRC (NL), March 21, 2023.  (A discussion between Claudia Wieners, co-author of the Call for balance, and Jeroen Oomen, co-author of the Non-Use Agreement)

Researching a technofix for the climate is dangerous. Or maybe it’s essential? NRC (Translation from Dutch, archived at Utrecht University), March 21, 2023.  (A discussion between Claudia Wieners, co-author of the Call for balance, and Jeroen Oomen, co-author of the Non-Use Agreement)

Zonlicht blokkeren: onbespreekbaar of laatste redmiddel voor het klimaat? (NL), March 20, 2023.

Radio Interview on RAI Zapping.  (IT), March 3, 2023.

Climate engineering onder de loep (podcast). Vroeg! BNNVARA NPO Radio 1 (NL), March 3, 2023. 

Das Dimmen der Sonne erforschen. Tagesspiegel (DE), March 1, 2023.
De zon dimmen? Wetenschappers willen meer onderzoek klimaatinterventies. NOS Nieuws (NL), February 28, 2023. 

Geknutsel aan de natuur verdeelt de wetenschap. Trouw (NL), February 28, 2023.

FEATURE: Scientists push for more geoengineering testing as first “carbon cooling” credits emerge. Carbon-Pulse, February 28, 2023.




Other media coverage and commentary

Could solar geoengineering cool the planet? U.S. gets serious about finding out. Science, February 28, 2023.

China Doesn’t Want a Geoengineering Disaster. Foreign Policy, February 21, 2023.

Should We Block the Sun to Counter Climate Change? New York Times, January 11, 2023.

Can geoengineering slow climate change? We need research to find out. The Washington Post, February 22, 2023.

Solar Geoengineering Should Be Regulated, U.N. Report Says. Scientific American, February 28, 2023.

Moral Hazard or Moral Duty? - Repairing the Climate with Greenhouse Gas Removal and Solar Radiation Management. Illuminem, January 21, 2022.






The Planet Remade – By Oliver Morton

The Governance of Solar Geoengineering: Managing Climate Change in the Anthropocene – By Jesse Reynolds

Geoengineering: The Gamble – By Gernot Wagner

After Geoengineering: Climate Tragedy, Repair, and Restoration – By Holly Jean Buck

Geoengineering our Climate? Ethics, Politics, and Governance – By Jason J. Blackstock and Sean Low 

Geoengineering, the Anthropocene and the End of Nature – By Jeremy Baskin



The Ministry for the Future – By Kim Stanley Robinson

Termination Shock  By Neal Stephenson





Report by the Overshoot Commission, including recommendations on SRM. 

One Atmosphere: An Independent Expert Review on Solar Radiation Modification Research and Deployment. By the United Nations Environment Programme (UNEP).

International Governance Issues on Climate Engineering - information for policymakers –By Marie-Valentine Florin (Ed.), Paul Rouse, Anna-Maria Hubert, Matthias Honegger, Jesse Reynolds

A risk-risk assessment framework for solar radiation modification – By Nicholas Harrison, Janos Pasztor, Kai-Uwe Barani Schmidt

Solar Radiation Modification and its implications for the Sustainable Development Goals –By Nicholas Harrison

Carbon Removal and Solar Geoengineering: Potential implications for delivery of the Sustainable Development Goals – By Honegger, M. A., Derwent, H., Harrison, N., Michaelowa, A., & Schäfer, S.

Combatting climate change through a portfolio of approaches – By Marie-Valentine Florin

Reflecting Sunlight: Recommendations for Solar Geoengineering Research and Research Governance – By the National Academies of Sciences, Engineering, and Medicine




Other Initiatives


The GeoMIP website offers a regularly updated list of (natural) science publications on SRM. 

The DEGREES initiative facilitates capacity building in Global South countries through joint researach projects. 

An open letter regarding research on reflecting sunlight to reduce the risks of climate change, drafted by members of the physical and biological science community.

The American Geophysical Union is developing an ethical framework for research on climate interventions.

Solar Geoengineering Non-Use Agreement, an initiative by academics seeking to de-normalize SRM and its consideration by the IPCC.



Research Articles


Aldy, J. E., Felgenhauer, T., Pizer, W. A., Tavoni, M., Belaia, M., Borsuk, M. E., ... & Wiener, J. B. (2021). Social science research to inform solar geoengineering. Science, 374(6569), 815-818.

Aldy, J.E. & Zeckhauser, R. (2020). Three Prongs for Prudent Climate Policy. NBER Working paper 26991.

Grieger, K. D., Felgenhauer, T., Renn, O., Wiener, J., & Borsuk, M. (2019). Emerging risk governance for stratospheric aerosol injection as a climate management technology. Environment Systems and Decisions, 39(4), 371-382.

Honegger, M., Michaelowa, A., & Pan, J. (2021). Potential implications of solar radiation modification for achievement of the Sustainable Development Goals. Mitigation and adaptation strategies for global change, 26(5), 1-20.

Honegger, M. (2019). Assessing Solar Geoengineering–What, Who, and How? Governance of the Deployment of Solar Geoengineering, 77. Harvard University. Boston MA, US.

Honegger, M., Münch, S., Hirsch, A., Beuttler, C., Peter, T., Burns, W., ... & Wallimann-Helmer, I. (2017). Climate change, negative emissions and solar radiation management: It is time for an open societal conversation. Risk-Dialogue Foundation. Zurich, Switzerland.

Horton, J. B., Keith, D. W., & Honegger, M. (2016). Implications of the Paris Agreement for carbon dioxide removal and solar geoengineering. Viewpoints. Harvard Project on Climate Agreements, Cambridge, Massachusetts, USA.

Honegger, M., Sugathapala, K., & Michaelowa, A. (2013). Tackling climate change: where can the generic framework be located?Carbon & Climate Law Review, 125-135.

Honegger, M., Michaelowa, A., & Butzengeiger-Geyer, S. (2011). Climate Engineering: avoiding Pandora's box through research and governance. FNI Policy Brief 5-2011.

Jinnah, S., Morrow, D., & Nicholson, S. (2021). Splitting Climate Engineering Governance: How Problem Structure Shapes Institutional Design. Global Policy, 12, 8-19.

Low, S., Honegger, M. (2022). A precautionary assessment of systemic projections and promises from sunlight reflection and carbon removal modeling. Risk analysis 42.9 (2022): 1965-1979.

Rabitz, F., et al. (2022): A preliminary framework for understanding the governance of novel environmental technologies: Ambiguity, indeterminateness and drift. Earth System Governance 12: 100134.

Rahman, A.A., Artaxo, P., Asrat, A., and Parker, A. (2018). Developing countries must lead on solar geoengineering research. Nature 556, 22-24.

Reynolds, J. L. (2021). Is solar geoengineering ungovernable? A critical assessment of governance challenges identified by the Intergovernmental Panel on Climate Change. Wiley Interdisciplinary Reviews: Climate Change, 12(2), e690.

Ricke, K. (2023). Solar geoengineering is scary — that’s why we should research it. Nature 614, 391.

Stephens, J. C., Kashwan, P., McLaren, D., & Surprise, K. (2021). The risks of solar geoengineering research. Science, 372(6547), 1161-1161.


A version of our letter has also been published as an editorial at Oxford Open Climate Change


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