we had predictive models of CO2s greenhouse effect decades ago, the predictions are coming true before our eyes already.

If you're running around 2018 saying "global warming is not a fact" I would urge some light reading on your part, it's really quite good writing in its own right:

Losing Earth: The Decade We Almost Stopped Climate Change

https://www.nytimes.com/interactive/2018/08/01/magazine/clim...