New net-zero pledges made at United Nations climate talks have created a slim but viable hope that the world could avoid a crucial redline for climate catastrophe, according to a new analysis, but worse outcomes remain possible if countries don’t deliver on their promises. One of the goals of the COP26 summit meeting is to keep alive the chance of limiting global warming to 1.5° Celsius from pre-industrial times. That’s the level scientists say gives humanity the best chance of avoiding the worst effects of climate change. Temperatures have already risen by 1.1°C, causing more extreme weather events such as wildfires, drought, and devastating floods. The latest 2030 plans to curb emissions under the Paris Agreement framework still don’t […]