Scientists from the National Academies of Sciences, Engineering and Medicine say negative emissions technologies that remove carbon dioxide directly from ambient air or which enhance natural carbon sinks could be scaled up to capture and store a significant amount of global carbon emissions, but not enough to ensure global temperature don't rise more than 2° C. As a result, more research is needed to understand how to overcome the existing constraints on the technologies, such as high costs and energy requirements.
In an NAS report released Oct. 24, the scientists say a substantial research initiative should begin as soon as possible to learn more about the impacts, limitations, and scalability of negative emissions technologies (NETs).