When will there be ecological "green" jet passenger airliners?

Answer 1

It seems there is a little interest in this coming from Boeing...
The jets of the future
The Concorde’s failure hasn’t killed the dream of supersonic flight. Japan hopes to have an airliner twice as fast as the Concorde in the air by 2012. The goal is a craft that can carry 300 passengers from Tokyo to Los Angeles in just four hours. However, most aeronautical experts agree that the next generation of passenger jets will be subsonic transports with vast seating capacities. Airbus has taken the lead with the A380 “superjumbo” jet. Envisioned as the world’s only double-decker, four-aisle airplane, the A380 will carry 550 people in a space huge enough to accommodate a shopping mall, gym, and bowling alley. About 100 superjumbos have already been ordered; service is expected to start in 2006. Boeing is betting that speed or fuel economy, not size, will be the hallmark of tomorrow’s commercial jets. The company’s Sonic Cruiser would fly at Mach 0.95 (95 percent of the speed of sound) and get long-distance travelers to their destinations 20 percent faster than a conventional jet. But with the economy sagging, airlines have shown more interest in another Boeing prototype, the 7E7, which uses 20 percent less fuel.
more.. http://www.usatoday.com/travel/flights/2004-06-16-dreamliner_x.htm

Answer 2

Yes, Qantas and other Australian airlines have already trialled "green" fuels successfully.

Answer 3

Al Gore of route! i respect those liberal solutions that he won't be able to fly commercial because of safe practices causes! LMAO! right here's a contact...do not tell lies to the american human beings and safe practices might want to develop right into a non difficulty!

Answer 4

What kind of fuel would they use? Sugar water?