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New Review Finds Polar Geoengineering Schemes Unproven, Risky and Costly

  • On Tuesday, an international team of 40 researchers published a peer-reviewed study in Frontiers in Science assessing five polar geoengineering proposals.
  • The study responded to growing concern since COP27 in 2022 about melting ice and political interest in geoengineering despite many ideas being untested and far-fetched.
  • The proposed methods include injecting reflective particles into the upper atmosphere, installing submerged barriers to block warm water, enhancing ice thickness, extracting water from beneath glaciers, and stimulating marine growth through nutrient addition; however, these approaches are associated with significant expenses, ecological risks, and practical difficulties.
  • Lead author Martin Siegert emphasized that these projects would cost at least $10 billion, likely fail, and risk delaying essential cuts to greenhouse gas emissions.
  • The study concluded that rapid and deep greenhouse gas reductions remain the only viable solution and warned geoengineering could harm ecosystems, international relations, and climate mitigation efforts.
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junge Welt broke the news in on Tuesday, September 9, 2025.
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