What would if all new development was stopped, and every structure retrofit with reliable but SotA high-efficiency solar along with efficient-minded environmental upgrades and electrical audit to get the power consumption down, such that ultimately almost every structure generated most if not all of it's own power, many contributed to the improved grid, and all transportation, shipping and planes included, was replaced with green electrical equivalent or even if compromised, obviously dismantled all coal and oil use and speculation, and somehow we got the global population under control, and we stopped contributing to Climate Change altogether?

How much hotter, globally in average, is it likely to get if we suddenly somehow stopped all the major anthropological contributors to Climate Change?

Because I'm starting to suspect we'll start to see large "spots" temporarily appear on the surface of the Earth, perhaps drag across, and everything on the surface in that spot will have a high chance of immediate mortality. Someone chill me out.