One of the old arguments was shipping & manufacturing. With GM downsizing over the last few years and no guarantees of any long term commitments the whole economic story around Durham region is fading very quickly. Supporting businesses are vacating and unemployment rising. Building an airport won't replace this amount of full time employees for any length of time.

This airport is pretty far from downtown and frankly in the middle of nowhere when it comes to transportation. What will it support? People flying into Markham & Scarborough?

I see some arguments being made that other major cities have secondary airports like New York, Paris & London.... Seriously people have a head shake and do some counting. These cities have 100's if not thousands more flights then Toronto. Toronto is one of the most efficient airports which I commute from compared to other places like Chicago, Kennedy or Atlanta etc... We have room to grow in TO with the supporting highway & artery systems around it.