From The Greens Australian website.
3.15 Recognising that air transport causes considerable environmental damage and is also less fuel efficient by a large factor particularly to transport by rail or by sea, the Australian Greens consider it important that the environmental costs of air transport are taken into account openly and incorporated into the cost of air travel.
I Guess that means that w**ker Bob Brown takes the ferry to Melb. and then train to CB rather than fly.......