PLEA Network

14 September 2023, Climate Home News: Overshoot Commission calls for research into solar geoengineering. Dimming the sun could “complement” emissions cuts, says panel of leaders, while acknowledging concerns about the risks. Governments should expand research into controversial solar geoengineering, while placing a moratorium on large-scale experiments outdoors, a panel of leaders has recommended. The Overshoot Commission was set up last year to examine ways of reducing risks if and when global heating surpasses 1.5C. In a report published on Thursday, it called for an acceleration in emission reductions, more resources to adapt to the impact of climate change and scaling up technologies to suck carbon dioxide from the atmosphere. The Commission also called for international discussions and scientific research on solar radiation modification (SRM). The technology aims to reduce the amount of sunlight reaching the planet’s surface. This could be achieved by pumping aerosols into the high atmosphere or by whitening clouds. Its proponents say it could be a relatively cheap and fast way to counter extreme heat. But it would only temporarily mask the impact of rising emissions, not tackle the root cause. The regional effects of manipulating the weather are hard to predict and risk worsening climate impacts in some places. The report acknowledged the technology’s potential drawbacks, but refused to take the option off the table. “It would be imprudent not to investigate or discuss SRM because present evidence suggests the possibility it could complement other approaches,” the Commission wrote. During a press conference, its president Pascal Lamy said appeals not to discuss solar geoengineering “feel fickle” and “not the way to go”. Read more here