Ted Parson, writing for Legal Planet, highlights two reports prepared by the National Research Council Committee on Geoengineering Climate, “Climate Intervention: Carbon Dioxide Removal and 
Reliable Sequestration” and “Climate Intervention: Reflecting Sunlight to Cool Earth.” Parson applauds the Committee’s efforts but claims the important questions relating to “the looming, slow-motion, steadily-getting-worse threat of climate change” are left unanswered. See Parson’s critique here.