Dude, you spend too much time hanging out at Evergreen Brickworks.  Less than 10% (20,000 out of 230,000 Canadian farms total) grow vegetables and nursery.  The other 210,000 farms are dairy, meat and crop operations . . despite your urban utopian thinking, these farms are not convertible into vertical hydroponics . . they require well-drained, flat land . . and they represent huge strategic value to our country (just wait till the Trump-Trudeau farm war kicks off). DO NOT TOUCH CANADA'S PRECIOUS FARMLAND!