We are not going down. At least it is very unlikely (I wouldn't trust climate models enough to completely rule it out).
Once things are getting too uncomfortable in industrial countries, they will reduce temperatures using geo-engineering and possibly carbon capturing. Today that may be controversial, because people are still dreaming of being able to cut CO2 emissions enough to make a difference, but once things are getting uncomfortable, people will demand a quick relief, and it will be a no-brainer.
And this will most likely create the next horrible side effect we hadn't thought about. Maybe it will make it even worse than it was. But at the time it was a "no-brainer"..
Once things are getting too uncomfortable in industrial countries, they will reduce temperatures using geo-engineering and possibly carbon capturing. Today that may be controversial, because people are still dreaming of being able to cut CO2 emissions enough to make a difference, but once things are getting uncomfortable, people will demand a quick relief, and it will be a no-brainer.