Flying regularly for work, I've noticed the airline industry markets itself as a climate villain, but the real issue might be the lack of high-speed rail alternatives. On a recent trip from London to Paris, the flight took 1.5 hours plus airport hassle, while the train took 2.5 hours door-to-door. Given that short-haul flights under 500 miles make up a large share of emissions, should we prioritize banning them in favor of trains? I'm not sure if infrastructure investment can keep pace, but the math seems compelling for routes with existing rail links.