Introduction to Solar Radiation Modification

Solar Radiation Modification (SRM) approaches – also known as solar radiation management, or solar geoengineering – would aim to reflect sunlight back into space, or allow more heat to escape Earth’s atmosphere, in order to reduce the global temperature.​

They would not address the causes of climate change and so are not a substitute for reducing emissions or removing carbon dioxide from the atmosphere, and adaptation. ​

At best, they might ‘buy time’ while those measures are accelerated. For now, SRM technologies are mostly theoretical, and we know little about their potential effects. But if ever deployed at scale, some could create long-term risks and governance challenges.​


Basic Information

What do SRM approaches
look like?
What governance
is needed for SRM?
What are some of the
big questions about SRM?

Learning more about Solar Radiation Modification

C2G has put together a range of products to help policymakers and their advisors learn more about Solar Radiation Modification, in multiple languages. Feel free to explore, and if you have further questions please get in touch with us via our contact form.


Dig deeper

Want to know more
about the evidence?
How would SRM affect the Sustainable Development Goals?
Want to know more about C2G’s plans to catalyse governance?
Interested in more infographics, videos and blogs?
Explore our Solar Radiation Modification page
What SRM approaches might be deployed in the Arctic?
Explore our Arctic page
What SRM approaches might be deployed at sea?
Explore our Marine Environment page

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