The extreme politicisation of this issue has caused this kind of thinking, which is simply not true.

Even the IPCC, the biggest authority on climate change says that temperatures might increase 2C in the next 50 years, reducing the GROWTH in GDP in the world by 6% (NOT actual GDP). This might have some bad consequences, but it's a far cry from the doomsday scenario of humanity dying within 12 years that people like AOC have talked about.

(btw, global temperatures rose about 2C in the last 50 years. We survived. In fact humanity is doing fairly well on most metrics)