Net zero supersonic flights?

United Airlines is taking net zero travel to supersonic speeds.
It has signed a deal with Boom Supersonic to purchase 15 of what it claims are the first large commercial aircraft to be net zero carbon from day one; built to run on sustainable aviation fuel (SAF).
The planes facilitate a return to supersonic speeds in aviation, with United claiming they are capable of flying at twice the speed of today’s fastest airliners and can connect more than 500 destinations in half the time.
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