Thanks for proving my argument

Extraordinary claims need extra-ordinary proof.

Humans have survived for hundreds of thousands of years, You are making the claim of their extinct in the next 50 years. The burden of proof is on you to prove that.

If you make the claim that Earth will stop spinning tomorrow, you have to produce the proof, not me

OP is not making the claim that Earth will stop spinning tomorrow though. Nor did OP mention 50 years. Nor does OP need to prove global warning, since many others have done that. Not that you'd read it but here's a readable summary of the evidence, https://royalsociety.org/topics-policy/projects/climate-chan...

Global Warming by 2-3 degress doesn't imply human extinction (or even the leading cause of deaths).

That is an incredible lazy, naive and dumb take on effects of Climate Change. Human ingenuity and technology and accumulated capital of nearly $200 Trillion can easily scale mitigating solutions when it really comes to it.

Unfortunately, Policy makers never take into account the dynamic, complex systems and use linear graphs done by low-paid interns to predict economic and human systems.