[specialist]

Yes and:

And it's very likely any fixes will not simply be a matter of reducing atmospheric carbon.

Here's a first principles explanation for why carbon net zero and sequestration are not the direct, most expedient path towards reducing temps.

"Dr. Ye Tao on a grand scheme to cool the Earth" https://www.volts.wtf/p/volts-podcast-dr-ye-tao-on-a-grand#d...

TLDR: Given the time and resources we have, focus on strategies for cooling the atmosphere the fastest way possible.

[DennisP]

Maybe most sensible approach: use SRM to reduce temperature directly and head off nasty positive feedbacks like melting permafrost, but treat that as buying time to get CO2 down to a safe level.