

It’ll be both, even a very aggressive response will take decades for it to Stop getting hotter then at best it will not get hotter. It will be 4-5 decades at best before it gets cooler.
Methane adds some uncertainty to that though. If you were to stop using gas it might cool off after it disappears in a decade in the atmosphere.
But it will keep getting hotter in every circumstance even if we act aggressively on climate change.

Trees are good and general greenery too, but then you run into water issues which will be the limiting factor for a lot of stuff going forward as fresh water availability decreases and groundwater runs low.