This isn't true, and you should probably cut whatever source told it to you out of your life. The world is going to end if we don't take action within 12 years, which is the gist of what the IPCC report says.
It doesn't matter.
"The world is going to end if we don't take action within 12 years" is also false, and not at all what the IPCC report says. When O'Rourke said something similar, the AP fact checked the claim:[2]
> THE FACTS: There is no scientific consensus, much less unanimity, that the planet only has 12 years to fix the problem.
> “This has been a persistent source of confusion,” agreed Kristie L. Ebi, director of the Center for Health and the Global Environment at the University of Washington in Seattle. “The report never said we only have 12 years left.”
And no, I'm not going to cut the AP and PBS out of my life just because some alarmists are delusional.
1: https://apnews.com/1c663bcb294c1752573f45fc5bf5e0f9/
2: https://www.pbs.org/newshour/politics/ap-fact-check-orourke-...