Qantas emits more carbon dioxide per passenger-kilometre than any other airline operating across the Pacific, according to an analysis by the International Council on Clean Transportation. For each kilometre Qantas transports a passenger across the Pacific, it uses 64% more fuel than the two most fuel-efficient airlines operating across the Pacific : Hainan Airlines and All Nippon Airways. One litre of aviation fuel was able to transport one passenger just 22km, on average, on Qantas flights, while Hainan and ANA were able to take a passenger 36km on 1L of fuel. Aviation currently accounts for about 2.5% of global carbon dioxide emissions, with pollution from the industry expected to increase. Alan Milne from Qantas said the airline ranked low because it used large aircraft, flew long distances and had premium cabins.