Inco Superstack vs Burj Al Arab

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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 Burj Al Arab (Arabic: ??? ?????, Tower of the Arabs) is a five star hotel located in the city of Dubai, United Arab Emirates. Managed by Jumeirah hotel group, it is one of the tallest hotels in the world, although 39 percent of its total height consists of non-occupiable space. Burj Al Arab stands on an artificial island 280 m (920 ft) from Jumeirah Beach and is joined to the mainland by a personal curving bridge. The form of the structure is designed to resemble the sail of a boat. It has a helipad near the roof at a height of 210 m (689 ft) above ground.

Source: Wikipedia