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I love this site is 20mg of cialis the same as 100 mg viagra The goal of the CIA-backed NAS study is to conduct a "technical evaluation of a limited number of proposed geo-engineering techniques," according to the NAS website. Scientists will attempt to determine which geo-engineering techniques are feasible and try to evaluate the impacts and risks of each (including "national security concerns"). One proposed geo-engineering method the study will look at is solar radiation management—a fancy term for pumping particles into the stratosphere to reflect incoming sunlight away from the planet. In theory, solar radiation management could lead to a global cooling trend that might reverse, or at least slow down, global warming. The study will also investigate proposals for removing carbon dioxide from the atmosphere.

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