The striking thing is not the bad news, which is not really news for those who have followed the science closely. It’s the report’s insights on possibilities for cautious optimism. …University of Leeds climate physicist Piers Forster… outlined the good and bad news from the report. The bad news was familiar: we are seeing “more intense and more frequent” weather extremes. …But the good news is that there is, “much more certainty that if we get to net zero CO₂ its contributions to further warming [are] also likely to stop”. At net zero, “the temperature change should even start to slowly go into reverse.” …He wrote: “We find that the risk of seeing abrupt changes or tipping points in our climate such as the Gulf stream stopping, Antarctic ice sheet sudden collapse, or Amazon forest dieback are low and will be very unlikely indeed if we can hold temperature rise close to 1.5C.”