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Is there a list of carbon sequestration projects?
(slrpnk.net)
CDR is removal of CO2 from the atmosphere - an essential basket of technologies for achieving UN IPCC best outcomes to mitigate climate change. This is a community for discussing advances and issues of CDR.
A friend of mine at openaircollective.cc made this map that lists various sites. I think it is too early in the technological development of these various approaches to make meaningful comparisons of effectiveness. The area of "MRV" - Measuring, Reporting and Verification - is in its infancy; the methods for measuring effectiveness are still being developed. For some processes it is pretty simple, and for others very complex.