Because every year IS our absolute last chance. Each emitted ton is there "forever" (at least for multiple centuries). Climate change can be stopped (like, paus

Because every year IS our absolute last chance. Each emitted ton is there "forever" (at least for multiple centuries). Climate change can be stopped (like, paused indefinitely) but can't be reversed. You are right that there is no absolute deadline. Now we are stuck with our hotter summers "forever". But we are not yet stuck with what comes next.