We need to make jets that run on biofuels or synthetic fuels. That's an issue of sustainability, not climate change. Those subjects are related but not interch

We need to make jets that run on biofuels or synthetic fuels. That's an issue of sustainability, not climate change. Those subjects are related but not interchangeable. I don't have the latest data, but I do recall various biofuels having a greater carbon impact than various fossil fuels a few years ago. If the situation has changed, great. But we need to remember that sustainable resources and climate friendly resources are not necessarily the same thing.