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Ranking · facilities

Steel: the 20 largest CO2 emitters worldwide

The 20 largest iron & steel CO2 emitters worldwide. Integrated BF-BOF route ≈1.9 t/t — the single biggest CBAM-exposed product category by volume.

#FacilityCountryt CO2/yr (est. 2023)Value at €75.36/t
1POSCO Gwangyang steel plantSouth Korea34,799,208€2,622.5M
2Angang Steel Co LtdChina31,049,504€2,339.9M
3Wuhan Iron and Steel Co LtdChina25,916,033€1,953.0M
4Maanshan Iron and Steel Co LtdChina25,389,837€1,913.4M
5Inner Mongolia BaoTou Steel Union Co LtdChina25,167,415€1,896.6M
6POSCO Pohang steel plantSouth Korea24,457,044€1,843.1M
7Baoshan Iron and Steel Co Ltd HeadquartersChina23,974,641€1,806.7M
8Zhangjiagang Hongchang Steel Co LtdChina21,886,764€1,649.4M
9Shougang Jingtang United Iron and Steel Co LtdChina21,766,330€1,640.3M
10NLMK Lipetsk steel plantRussian Federation20,558,330€1,549.3M
11Hyundai Steel Dangjin steel plantSouth Korea20,049,392€1,510.9M
12Rizhao Steel Holding Group Co LtdChina19,273,891€1,452.5M
13JFE West Japan Works (Fukuyama) steel plantJapan19,085,123€1,438.3M
14Bengang Steel Plates Co LtdChina18,600,996€1,401.8M
15ThyssenKrupp Steel Duisburg steel plantGermany17,975,297€1,354.6M
16Magnitogorsk Iron and Steel WorksRussian Federation17,594,774€1,325.9M
17Tata Steel Jamshedpur steel plantIndia16,653,502€1,255.0M
18Xinyu Iron and Steel Group Co LtdChina16,560,215€1,248.0M
19Severstal Cherepovets steel plantRussian Federation16,537,222€1,246.2M
20JSW Steel Vijayanagar steel plantIndia15,936,581€1,201.0M

Source: Climate TRACE satellite estimates (2023) via our IndustryAtlas (30,000+ facilities) — indicative, not verified declarations; corrections welcome. Indicative value = est. emissions × CBAM certificate €75.36 (Q1 2026 official); actual CBAM applies only to EU-bound export share.

How this page is built: heat-loss figures follow ASTM C680 / ISO 12241 (the method behind our public calculators); facility emissions from Climate TRACE & EU ETS verified data across 30,000+ industrial sites; the 2026–2034 schedule is Regulation (EU) 2023/956, not a forecast. Published by Inzonex — manufacturer of modular removable insulation (UK Patent GB2508992.1). Spotted an error? Tell us — we correct on evidence.
Inzonex removable modular insulation on industrial equipment
Cut the tonnes at the source

Hot industrial equipment? Cut the heat loss.

Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets:

  • Up to 90% less heat loss from insulated surfaces
  • Surface temperature ≤45 °C — touch-safe for workers (EN ISO 13732-1)
  • 6× faster maintenance access than fixed cut-and-weld lagging — unclips and refits in minutes, no destruction
  • Inspectable — comes off to check for corrosion under insulation, then refits like-new (generic jackets often don't survive removal)
  • Typical payback under 2 years (some 9–11 months)
Source: Inzonex Carbon Hub — inzonex.co.uk/carbon · prices dated as shown on each figure · schedule per Regulation (EU) 2023/956 · indicative analytics, not compliance advice.