Inco Superstack vs Tianjin World Financial Center

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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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The Tianjin Tower, or Jin Tower (Chinese: ??; pinyin: J?nt?), or Tianjin World Financial Center (Chinese: ????????; pinyin: Ti?nj?n Huánqiú J?nróng Zh?ngx?n) is a Contemporary supertall skyscraper located in the Heping District of Tianjin, China, on the banks of the Hai River.

The mixed-use tower is 336.9 meters (1,105 ft) tall and contains 74 floors above ground and 4 below, with an observation deck in 305.2 meters (1,001 ft). The region of the glass unitized curtain wall, manufactured by Jangho Group, is 215,000m². It's notable as the first office building in Tianjin to be equipped with double decker elevators.The skyscraper was topped-out on January 14, 2010 and opened in 2011. The building is owned by Financial Street Holding, with JLL (company) as joint sales and leasing agents.

Source: Wikipedia