There are no brakes. There's nothing you can say to any leader, politician, or pleb that can shock them into action. CO2 at 400+ ppm? Shrug. Global temperature rise nearing the acceptable limit for 100 years from now happening in much less than half that time? Shrug. Permafrost melting 70 years ahead of schedule? Yawn.
Not only is there no system in place that can fix this now, no system can arise that would have any hope of slowing it, or even slowing its acceleration. Get used to it. This isn't a movie. There are no heroes. You're all dead. And you have no idea.