Inco Superstack vs Wenzhou World Trade 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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Wenzhou World Trade Center (Chinese: ????????) is a 68-floor supertall skyscraper in Wenzhou, Zhejiang, China. Construction of the building began on 9 June 2003 and was completed in 2010 at 333 m (1,093 feet ), giving it the name of the 107th-tallest construction in the world. It's located in the downtown area of Wenzhou in which it stands as the tallest building in the city, the tallest in Zhejiang province and the 56th-tallest in China. The Wenzhou World Trade Center is to be used as office space and a luxury hotel. Original plans called for the Wenzhou World Trade Center to be just 260 m (853 ft) tall.

Source: Wikipedia