It's not one or the other, as mentioned in the linked article. In any case even if all greenhouse gas emissions stopped today, which is not possible or even des

It's not one or the other, as mentioned in the linked article. In any case even if all greenhouse gas emissions stopped today, which is not possible or even desirable, we'd still have a roughly 1.5 degree rise in average global temperature within the next couple decades. So, it's a question of whether we decide to live with the inevitable effects (the beginnings of which we're only starting to see) or do something about it. If the latter, what method balances effectiveness and safety in a scalable way, and marine cloud brightening is one of the best candidates for that.