It's not even the environment, just the cost of fuel made supersonic travel uneconomical. Saving 3 hours off of a flight isn't worth thousands of dollars to en

It's not even the environment, just the cost of fuel made supersonic travel uneconomical. Saving 3 hours off of a flight isn't worth thousands of dollars to enough people. Boom's innovation is to target billionaires with supersonic bizjets. Personally I think their business model is risky, but not necessarily impossible.