But although he readily admitted: "I fly jets", he failed to mention he actually owns five, along with his own private runway.
Clocking up at least 30,000 flying miles in the past 12 months means he has produced an estimated 800 tons of carbon emissions nearly 100 times the average Briton's tally.
Travolta made his comments this week at the British premiere of his movie, Wild Hogs.
He spoke of the importance of helping the environment by using "alternative methods of fuel" after driving down the red carpet on a Harley Davidson.
Travolta, a Scientologist, claimed the solution to global warming could be found in outer space and blamed his hefty flying mileage on the nature of the movie business.
But his appointment as a "serving ambassador" for the Australian airline Qantas doesn't seem to have much to do with the movies. Nor does a recent, two-month round-the-world flying trip.
"It [global warming] is a very valid issue," Travolta declared. "I'm wondering if we need to think about other planets and dome cities."
A photoshop of John Travolta's home, with an airplane parked in his garage.
Wait. That's not a photoshop. That's an actual picture.
Has anyone actually seen this movie? I have. It's deliciously awful. I heartily recommend it to anyone who's a fan of bad cinema.
Sympathy For The Scientologist: I think a lot of Hollywood people basically feel mau-maued into parroting the global warming line, for the same reason most "nice people" will say they believe in it (and will also say that anyone who doesn't is evil).
Because they're stupid and gutless.
No way, however, are they giving up their limos, heated swimming pools, and chartered jets to rainforest concerts.
Reducing some nitwits like Travolta to begin talking about "domed cities" and emigrating to Mars.