There is no fact or proof in this column, which is merely parrots an extremist green agenda.  This person is not an expert on housing, rather another lefty university fixture.  You only have to look at other fast-growing cities which do not have greenbelt policies, and compare house prices.  Look at Dallas, Houston, Chicago etc.  And certainly in Ontario, Ottawa and London have no such problems.  In fact, the Liberal's Greenbelt is the primary reason for the difference in price increases between the GTA and other North American cities.  

The other reasons cited, like low interest rates, the bank of Mom and Dad etc. are common factors in other cities, and yes, they do contribute to higher home prices.  But the GTA's 'special sauce' is the Greenbelt and land planning policies.