Inco Superstack vs Scotia Plaza

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The Inco Superstack in Sudbury, Ontario, with a height of 381 metres (1,250 ft), is the tallest chimney in Canada and the Western hemisphere, and the 2nd tallest freestanding chimney in the world after the GRES-2 Power Station in Kazakhstan. It's also the second tallest freestanding structure of any kind in Canada, behind the CN Tower but forward of First Canadian Place. It's the 40th tallest freestanding structure in the world. The Superstack is situated on top of the biggest nickel smelting operation in the world at Vale's Copper Cliff processing centre in the city of Greater Sudbury.

In 2018, Vale declared that the stack will be decommissioned and dismantled beginning in 2020. On July 28, 2020, Vale declared that the stack had been officially taken out of service, but would remain operational in standby mode for two more months as a backup in case of a malfunction in the new system, after which the dismantling of this Superstack will begin. In addition to further reducing sulfur dioxide emissions by 85 percent, the decommissioning of the pile is expected to cut the complex's natural gas consumption in half.

Source: Wikipedia

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Scotia Plaza is a commercial office complex in the city of Toronto, Ontario, Canada. It is in the financial district of the downtown core bordered by Yonge Street on the east, King Street West on the south, Bay Street on the west, and Adelaide Street West on the northwest. At 275 m (902 ft), Scotia Plaza is Canada's third tallest skyscraper and the 22nd tallest building in North America. It is on the PATH network, also contains 190,000 m2 (2,045,143 sq feet ) of office space on 68 flooring and 40 retail stores. Olympia and York developed the complex as an expansion of the adjoining headquarters of Scotiabank and the bank continues to occupy approximately 24 floors of the structure. Olympia and York owned the complex from its completion until the business was liquidated due to overwhelming debt in 1993. Scotiabank led a consortium of banks to buy the mortgage for Scotia Plaza and within the next five years, it bought additional shares from its partners before it was the property's majority owner.On January 19, 2012, Scotiabank announced it would sell the iconic building and on May 22, announced a final agreement with Dundee Real Estate Investment Trust (now Dream Office REIT) and H&R Real Estate Investment Trust for $1.27 billion, making it the last of Canada's leading banks to divest ownership of its Toronto headquarters land. In 2016, H&R and Dream sold 50% of the construction to KingSett Capital and AIMCo; in 2017, Dream sold its remaining 50% stake in 2017 to the same two companies.

Source: Wikipedia