Abstract
A commonly discussed form of geoengineering is the modification of solar radiation. A number of technologies could be used to reduce solar radiation incident on the Earth in order, in theory, to counteract global warming. In 2024, the European Commission asked its " Group of Chief Scientific Advisors " - of which Éric Lambin is a member - for a scientific opinion on the risks and opportunities associated with the research and deployment of these technologies. The presentation will introduce these technologies and summarize the recommendations made to the European Commission. The effects of technological intervention on solar radiation are highly uncertain, involve major risks and do not solve all the problems associated with climate change. What's more, no global governance system exists to oversee the deployment of these technologies. Under no circumstances can modifying solar radiation replace a rapid reduction in greenhouse gas emissions.
