Answers

No, it is not too late to avoid the worst outcomes of climate change or to stabilize (and potentially partially reverse) warming, but it is too late to fully undo all changes or return to a pre-industrial climate on human timescales. Some impacts are already locked in, the window for limiting peak warming is closing rapidly, and every fraction of a degree of additional warming avoided still matter

The short answer is no, it is not too late to prevent the worst effects of climate change, but we can no longer prevent it entirely. To understand where we stand, it helps to separate what is already "locked in" from what we still have the power to change. --- 1. What is too late to change (The "Locked-In" Effects) Human activity has already warmed the planet by approximately 1.1°C to 1.2°C