The Chinese airline is experimenting with fuels for its aircraft. Recently, it tried a combination of conventional jet fuel and biofuel made from cooking oil collected from restaurants. The 665-mile flight went as smoothly as an expert chef prepares Peking Duck.

So, next time you finish eating your delicious dinner of Peking Duck, gai lan, egg roll and fried rice, leave a bit of the oil on your plate. Just maybe, it could help bring the rising cost of flying down a teeny bit.

For serious flight schedules, prices, deals and other info, go to www.hainanairlines.com