https://unfccc.int/sites/default/files/resource/28_EASAC%20Report%20on%20Negative%20Emission%20Technologies.pdf https://unfccc.int/sites/default/files/resource/

https://unfccc.int/sites/default/files/resource/28_EASAC%20Report%20on%20Negative%20Emission%20Technologies.pdf https://unfccc.int/sites/default/files/resource/28_EASAC%20R... This document from EASAC (European Academies' Science Advisory Council) is a pretty nice and well sourced overview of many (not all) different negative emission technologies/methods.