Princess Tower vs Inco Superstack

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The Princess Tower (Arabic: ??? ????????) is a 101-story, 413.4 m (1,356 feet ) tall residential-only skyscraper located in the Marina district of Dubai, UAE. Princess Tower is currently the third largest building in Dubai, after the Burj Khalifa and the Marina 101 and the 29th tallest building in the world.

Princess Tower was the tallest residential building in the world from 2012 to 2015, when it was overtaken by 432 Park Avenue in New York City.

Source: Wikipedia

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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