Inco Superstack vs St. Stephans Cathedral

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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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St. Stephen's Cathedral (more commonly known by its German Name: Stephansdom) is the mother church of the Roman Catholic Archdiocese of Vienna and the seat of the Archbishop of Vienna, Christoph Cardinal Schönborn, OP.

The current Romanesque and Gothic sort of the cathedral, seen now in the Stephansplatz, was mostly initiated by Duke Rudolf IV (1339--1365) and stands on the ruins of two earlier churches, the first a parish church consecrated in 1147. The main religious building in Vienna, St. Stephen's Cathedral has borne witness to a lot of important events in Habsburg and Austrian history and has, with its multi-coloured tile roof, become among the city's most recognizable symbols.

Source: Wikipedia