Airline asks passengers to pee before flying By Kesavan Unnikrishnan. Japanese airline All Nippon Airways is asking its passengers to use the bathroom before they board the plane in an attempt to reduce carbon emissions. The new policy was implemented by the airline from October 1. Signs are being put up at airport gates asking passengers to visit the lavatory before boarding. The new policy started a one-month trial but the airline plans to expand it indefinitely if it's effective. According to ANA, empty bladders will cut down passengers' overall weight which will result in lighter aircrafts and lower fuel...