Since that intervention may arrive late-or-never in different nations, it's one of the reasons that I believe active carbon dioxide removal measures will be necessary in addition to emissions reduction efforts.
Both regulating carbon emissions and active carbon dioxide removal measures will, in the end, come down to some state or world body acting in a coordinated way to push money at this problem. It seems like people are imagining active removal would be easier in this fashion than basic regulation. Why?
If most countries decide to use basic regulation but, say, Russia, does not, then the other countries could use active removal to offset the Russian emissions. Not likely a world body is forcing Russia to do anything (although if Europe stopped using their gas, they would have a lot less power).
Find a way to build georedundant electricity links from stable solar fields in e.g. the Sahara or so, up to Europe, with a reliable capacity of ~ 1 TW or maybe even closer to 5 TW, along the feeding solar arrays, and we can use existing ways to store energy for nightly use to wean Europe of natural gas in about a decade.
The largest one build seems to be 10 GW
between Xinjiang and Anhui. It's still quite a bit from the scale we'd need to wean of natural gas however.
Both regulating carbon emissions and active carbon dioxide removal measures will, in the end, come down to some state or world body acting in a coordinated way to push money at this problem. It seems like people are imagining active removal would be easier in this fashion than basic regulation. Why?