This Is London calculates that the flying Travolta has done in the past year adds up to a hefty 800 tons of carbon emissions. Travolta made his comments after driving down the red carpet on a Harley Davidson. Travolta blamed his flying on the movie business and also said that perhaps we should be thinking about other planets and "dome cities" as possible solutions. He did admit that he is not the best person to lecture on the problem of global warming due to his love of flying planes. So far he has not done what other actors and performers (and Al Gore) have done and purchase carbon credits to offset his pollution.
In a related story, after leaving London on his plane, Travolta went to Germany for another premiere. While flying his private jet from Germany to New York, the Boeing 707 suffered "technical difficulties" mid-flight and he was forced to make an emergency landing at Shannon airport in Ireland.
Upddate: TMZ reports that there was never an emergency, that Travolta's plane made a routine fuel stop and problem with the #2 engine was discovered and a starter was replaced.