Toronto is on pace to move up in North America’s skyscraper rankings, thanks to a building boom that shows little sign of wavering. With 67, Canada’s largest city ranks third on the continent for tall buildings of at least 150 meters (492 feet), but with 31 more under construction and 59 proposed, it will leapfrog Chicago -- which boasts 126 skyscrapers with another 19 under construction or proposed -- for second place, according to the Council on Tall Buildings and Urban Habitat. The good times are also reflected by the amount of tower cranes dotting the skyline, with Toronto boasting the most among 13 major cities surveyed by consulting firm Rider Levett Bucknall Ltd.