Japan Airlines is asking passengers to go to toilet before flights . Megumi Tezuka estimates that 4.2 tons of carbon dioxide This week would be reduced . `` We are making these items lighter -- and making the passengers lighter , a little bit , '' Tezuka said . Comes as Japanese airlines are struggling in the weak economy .
Japan Airlines is asking passengers to go to toilet before flights . Megumi Tezuka estimates that 4.2 tons of carbon dioxide This week would be reduced . Comes as Japanese airlines are struggling in the weak economy .