Not sure these are of comparable scale. Whitby GO is about 36 acres with its parking. Similar for Oakville GO. Lets say the four GO stations in question are up to 200 acres. Ford removed 7400 acres from the Greenbelt.
Well........
I may beg to differ.
Even if one assumes Jen Keesmaat's example was meant to imply these 4 sites are equivalent to the entire 7,400 acres..........(which I don't think represents her intent)
How many units of housing are likely to be built on some of these parcels, some of which are currently un-serviced, not next to any existing development or whitebelt lands?
I'm going to suggest, absent concrete proposals, that allowing for roads/parks/schools etc, we could be looking at proposals that would net as little 2 units per acre and unlikely to net more than 5.
That gives you a range of 14,800 units - 32,000 units.
On the other hand, the 200 acres of PMTSA-type sites, which could easily see 50s towers, could reasonably generate 500 units per acre w/o difficulty, even allowing for parks, roads and schools.
That's 100,000 units.
Even if you think I'm overestimating by 1/2, you get 50,000 units.,
I'm not sure the comparison is so inapt as you think.
I would then suggest, that she used these 4 sites as examples, and if you extended them to other comparable GO Stations......the case is well made that no land from the Greenbelt is required to generate the amount of housing that the Greenbelt land transfers is likely to generate.