Star-Telegram: Less gasoline. Less jet fuel. Less crude oil. Less natural gas falling 7 percent and October 4.5 percent. The result? Gasoline consumption plunged 8.5 percent in September and was down 4 percent in mid-December, the latest figure available from the federal Energy Information Administration. It’s a similar story in the skies. U.S. air travel in November was the slowest since 9-11. American, United and Continental airlines all said traffic was down at least 10 …