Inco Superstack vs Isla Multiespacio

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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 Isla Multiespacio Complex (abbreviated IME) is among the most ambitious architectural projects of recent years in Venezuela. This is currently under construction in the Municipality of San Diego in Valencia, Carabobo State (Venezuela). Its construction started in July 2009 and is expected to be completed in 2018. From the Isla Multiespacio stands the highest office tower in the Midwest, the skyscraper would be 142 m initially but then they decided to increase the height to 245 m and 65 flooring, it's the tallest building in Venezuela, built the first private theater in the nation and a hotel designed for guests with joy social areas looking at the city from above, among other projects.

Source: Wikipedia