The reason to dismiss them is this:
In 2060 the poor suckers we call the next generation are not going know what I knew, I'm guessing
Predicting the future of humanity is hard. 75 years in the future is an eternity in modern times. Even 35 years is a very, very long time.
75 years ago we barely had computers. In the USA, 20% of households did not even have a flushing toilet or running water. Cars? Phones (regular land lines!)?, TVs? Air conditioning?
See: https://ourworldindata.org/gra...
Now we're in the age of AI, we have Solar PV and wind power being massively deployed, even Dune-esque wind traps being deployed, and everything turning electric. Yes, the physics of CO2 and greenhouse gases are pretty straightforward, but the point is that there is so much new technology and science to be deployed until then (whether it be for reversing, mitigating or working around the issues) that it is crazy to claim any certainty about what the future will look like.
Don't get me wrong: I'm not saying "technology will solve everything and just sit back and relax", just that a dystopian barren hellscape is absolutely not something you can predict reliably or have any certainty towards.
With regard to the green and lush forests: Nature can bounce back pretty quickly, given the right circumstances: https://www.sciencedirect.com/...
Life finds a way.