The GSPT also includes all plants meeting the five hundred ttpa threshold that have been proposed since 2017 or retired or mothballed since 2020. Steel plants consist of multiple units, depending on the iron and steel production method used. Iron and steel are typically produced through coal-based methods (blast furnace and basic oxygen furnace or open hearth furnace) or electricity-based production (electric arc furnace charged with scrap metal, pig iron, direct reduced iron, or a combination). The GSPT map and underlying data are updated annually. Each plant included in the tracker is linked to a wiki page on GEM.wiki, which provides additional details.
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