It's in line with the 2019 IPCC report, which called for an 80% reduction by 2050 https://grist.org/article/how-soon-do-we-need-to-cut-greenho...

There's really no budget for burning kerosene if we are serious about the 1.5 degree target. The only way I see aviation being compatible is if there is a massive breakthrough in biofuels or battery technology.