"Failure to cut carbon emissions means ‘rapid transformation of societies’ is only option to limit impacts"
The UN implies that the only way we'll be able to stop global warming, is if we implement socialism immediatly.
The 1.5°C degree limit is important because once we cross it, a domino-effect of self-reinforcing mechanisms is activated, see:
- https://www.science.org/doi/abs/10.1126/science.abn7950
- https://www.pnas.org/doi/10.1073/pnas.1810141115
You can see examples of what's likely to happen by looking at other countries going through what's expected to happen to the US. The Dominican Republic has been getting pummeled by climate change and their attitude towards Haitians has been pretty awful overall. The amount of Haitians trying to get in is comparable to the amount of refugees expected to get into the US when you take the Dominican Republic's size into account.
Guatemala also has a lot of refugees trying to get to the US and this leads to violent border patrol and gangs picking off refugees for trafficking. I don't think all of South America will become uninhabitable by 2050, but most of it will be. The ones hanging on will still be plagued with significant issues that will only get worse as time goes on.