Biofuels will easily solve the Carbon Footprint issue of these supersonic airliners - liquid hydrocarbon is way more energy dense than even the best batteries so is going to have to be an option for a long time. Is Kerosene jet fuel really that different to Canola oil? Not as far as an industrial...

ABSOLUTELY LEGISLATE AGAINST ULTRA LONG HAUL ECONOMY.I fully support comment by Eli that Govt should legislate against Economy for such long haul flights. Some people are forced to fly economy by employers, I did over 350,000 km in economy in 2017. Like the vast majority of business travellers, I...