It is insane how some people believe technology will fix everything. As you say, it will most likely be business as usual until industrial civilization collapses.
We would never have been able to mess up the atmosphere so much without industrial technology and now it is likely in my opinion that we will never be able to fix it without that same level of technology. At least if we want to avoid megadeaths-scale disaster (and even then, it's a very long shot and I doubt we will manage it).