We know from scientific evidence that to have any chance of limiting global warming to 1.5 degrees Celsius, we must cut global emissions by at least 45 percent on 2010 levels by the year 2030. Staying below that 1.5 degree threshold is what the world's leading climate scientists have said is the best chance that we have of avoiding climate crisis. It has been three years since climate scientists told us that. So here we are, three years further down the road, no longer with 12 years to cut emissions at the level required but nine years. And it's not like the task is getting any smaller.