Inco Superstack vs Baiyoke Tower II

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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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Baiyoke Tower II (Thai: ????? 2; RTGS: Bai Yok Song) is an 88-storey, 309 m (1,014 feet ) skyscraper hotel at 222 Ratchaprarop Road at the Ratchathewi District of Bangkok, Thailand. It's the third tallest building in the city, after MahaNakhon and Magnolias Waterfront Residences in ICONSIAM. The construction comprises the Baiyoke Sky Hotel, the tallest hotel in Southeast Asia and the seventh-tallest all-hotel structure in the world.With the antenna included, the building's height is 328.4 m (1,077 feet ), and features a public observatory on the 77th floor, a bar calledRoof Top Bar & Music Lounge on the 83rd floor, a 360-degree revolving roof deck on the 84th floor and the hotel provides 673 guest rooms. Construction on the building ended in 1997, with the antenna being added two decades later. The Baiyoke Sky Hotel website notes the height without the antenna as 309 m (1,014 feet ), but the Council on Tall Buildings and Urban Habitat (CTBUH), Emporis and SkyscraperPage note it as 304 m (997 ft).

Source: Wikipedia