WASHINGTON: Failing to curb emissions of nitrous oxide will make it impossible to meet the main goal of the Paris climate agreement to keep global warming to 1.5 degrees Celsius, according to the first major global assessment of the pollutant released on Thursday (Oct 31). WHY IT'S IMPORTANT Nitrous oxide is the third most prevalent greenhouse gas and the worst ozone-depleting gas. The Global Nitrous Oxide Assessment (N2O) report is similar to the 2021 Global Methane Assessment, which showed