the U.S. spend $100 million to $200 million over the course of a half-decade to better understand potential risks and benefits.
In an ideal world, solar geoengineering researchers imagine a globally unified response to climate change that includes both solar geoengineering and old-fashioned emissions reductions. While geoengineering could mitigate the effects of global warming in the short term, it would taper off as the concentration of atmospheric greenhouse gases decreased.
Because of the uncertain nature of these models, however, we’ll never have a fully realized understanding of the effects of solar geoengineering unless we decide to implement it. To many of the technology’s critics, this uncertainty is an unacceptable risk.
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