29 Avoid air travel; it produces three times more carbon dioxide per passenger than rail.
29 Avoid air travel; it produces three times more carbon dioxide per passenger than rail.
施行尽量避免乘坐飞机，飞机平均每位旅客所产生的二氧化碳是火车的三倍多。
29 Avoid air travel; it produces three times more carbon dioxide per passenger than rail.
施行尽量避免乘坐飞机，飞机平均每位旅客所产生的二氧化碳是火车的三倍多。