otherwise use the internet, travel by train, bus or ferry/ship. Simple
Are trains and ferrys more environmentally friendly over a long distance? What value do you place on the 1000KMs of environmental destruction you require to build the railway when about 3KM of runway at each port will get you anywhere in the world? The internet as well is not as environmentally firendly as you think it is. Think about the power required, the millions of miles of cable, the water use of the data centres etc etc End of the day everything costs something it just a question of the best use of resources.