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How to Subtract: Removing Greenhouse Gas from the Atmosphere

Photo of Metta W. Spencer

Metta W. Spencer

Even if we could stop all carbon emissions today, the global temperature would continue rising. The IPCC has stated that it will also be necessary to remove carbon that has already been emitted. Fortunately, there are many ways to do so, though few of them have been tested adequately to scale up immediately. This talk will describe some of the most promising options.