PARIS (AP) — Boeing predicted that the number of commercial aircraft in operation globally will double in the next two decades, with the bulk of some 35,000 new planes going to Asia, an executive from the US airplane-maker said Tuesday.

Speaking ahead of the Bourget international air show in Paris, Randy Tinseth, vice-president of marketing for Boeing Co., said rising oil prices are forcing carriers to think harder about efficiency, and that means smaller planes that burn less fuel. It also means design changes, streamlined air traffic control and improved navigation to shave miles (kilometers) off each flight.