Ay, there's the rub.
"an open and transparent review process that ensures such experiments have the necessary social license to operate." ... "the conference's attendees, which includes top climate scientists, policymakers, and geoengineering scholars." ...
How to achieve such an "open and transparent review process," something much needed in all spheres of public policy, of public life, in any putative democracy or, indeed, in an anarcho-sindicalist polity? Well, for a start, surely:
1. Exclude the politicians and other such "policymakers" from the public review process: their job is not to intrude upon the public debate, but to receive and execute instructions based on the conclusions arrived at by said review process;
2. Exclude all corporations and representatives of corporations. Exclude the 'power of money' and other such nefarious influences, exclude, indeed, any and all economic considerations: this issue is bigger than all of that, and economic systems can much more easily adapt to rapid change than can environmental systems.
Following such principles I'd suggest, under UN auspices, the Human Rights Committee, for example, to open up a secure (ie free from psyops and other such interference) open internet channel as a forum for the review/debate including adecuate finance for all forms of openly-available media formats, including broadcast-quality streaming video (make it more interesting than the usual TV, or even what's on facebook).
Open and transparent, and focused on the issues, is what's absolutely necessary, here and everywhere.
This, of course, the neo-Fascists will never allow, since it goes completely against their political philosophy which states that the 'public' is incapable of running its own affairs so therefore a superhuman elite overclass is needed to govern (in its own interest).
/off rant (sorry).