Inco Superstack vs Almas Tower

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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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Almas Tower (Arabic: ??? ?????? Diamond Tower) is a 68-storey, 360 m (1,180 ft), supertall skyscraper in the Jumeirah Lakes Towers, Dubai, United Arab Emirates. Construction of the office building began in early 2005 and was completed in 2009 with the installation of some remaining cladding panels at the top of the tower. The building was topped out in 2008, and became the tallest building in Dubai until 2009 when it was surpassed by Burj Khalifa.

Source: Wikipedia