Two NAS Reports on Geoengineering Techniques for the Removal of Greenhouse Gases

National Academy Press

Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration

Climate Intervention: Reflecting Sunlight to Cool Earth

[Dot Earth]  The panels’ overarching bottom line is straightforward:

There is no substitute for dramatic reductions in the emissions of CO2 and other greenhouse gases to mitigate the negative consequences of climate change, and concurrently to reduce ocean acidification.

There are no big surprises in the voluminous reports, but they do provide a great guide to both the scientific and societal issues attending using “climate interventions” — the reports’ phrase for geoengineering techniques — to counter humanity’s continuing intervention: the release of tens of billions of tons of carbon dioxide a year.

The scientists find much merit in pursuing further research on both, but only see practical prospects for capturing and storing carbon dioxide, the main greenhouse gas emitted by human activities. Methods for reflecting sunlight, or increasing the planet’s “albedo,” are fraught with technical and diplomatic challenges…


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