Check Wikipedia on the topic, there are a ton of papers that were (within the given error margins) right about the warming we'd be seeing given a certain number

Check Wikipedia on the topic, there are a ton of papers that were (within the given error margins) right about the warming we'd be seeing given a certain number of continued emissions. Even the oil companies were behind this and continue to not deny it (they just continue, just like tobacco companies, to not care enough because it makes them very rich and there is enough diffusion of accountability). Nobody ever said fireball, but the average temperature moving multiples of degrees is already materializing in real world measurements.