Anyway, what is the solution that the scientific community proposed and that was killed by the political and corporate establishment?
What is the plan that the non-US countries have implemented to eliminate the problem?
This has been agreed multiple times, most notably the Paris agreement of 2015, which set deadlines for countries to achieve carbon neutrality.
The plan failed in e.g. the US because politicians didn't follow through. Trump literally withdrew from the Paris agreement.
All but 3 countries in the world participate in the Paris agreement. This includes all big CO2 emitters, like China, US (now withdrawn), India and EU countries.
"Be fit!" is a goal.
"Go to the gym at least 5 days a week" is a plan.