travel by air or sea?

[earwigmc]

i just found the answer to one of my questions within a question at the bottom of a webpage[0][1]:

Did you know that flying produces 36 times more carbon dioxide per passenger-mile than sea travel?

[0] as opposed to the bottom of a glass...?
[1] the webpage: http://members.aol.com/CruiseAZ/pzm.htm