South Korea's largest steelmaker and one of the world's top-five producers, with an active hydrogen reduction steelmaking (HyREX) R&D programme but current output overwhelmingly from blast furnaces.
Green Score
- Greenwashing risk
- medium
- Data confidence
- high
- Method
- how it is calculated
Climate Impact & Solution35%14
Does the core business genuinely avoid or reduce emissions, or build climate resilience? Share of revenue that is actually 'green'. Fossil-dependent models score low.
POSCO's core business is blast-furnace steelmaking emitting ~71 million tonnes of CO₂ per year as of 2024; HyREX produces only pilot-scale volumes (24 t/day) and the 300,000 t/yr demonstration plant won't commission until ~2028, meaning current climate impact is overwhelmingly negative and decarbonisation is years from material scale.
Decarbonization & Targets20%38
Credible, science-based targets (SBTi), a real net-zero plan with progress to date, and CDP disclosure — not just a dated press release.
POSCO has a 2050 net-zero declaration (made December 2020), a phased roadmap targeting only 10% absolute reduction by 2030 from a 2017–2019 baseline of 78.8 Mt—weak near-term ambition—and no SBTi-validated targets; CDP score was B for Climate Change in 2024, and Scope 3 verification began only in 2022, leaving targets credible in structure but well below science-based 1.5°C requirements.
ESG & Operations15%42
Operational footprint, labour and social practices, and governance quality across the company's own operations and supply chain.
POSCO maintains structured ESG governance with quarterly board-level decarbonisation reviews, improving LTIFR safety metrics (down 27% 2022–2023), and an internal carbon pricing system introduced in 2024, but independent labour rights groups have documented union-busting at a Turkish facility where courts confirmed unlawful dismissals of workers attempting to organise.
Transparency & Verification15%55
Quality of disclosure, independent third-party verification, and how much hard data backs the company's claims.
POSCO has disclosed to CDP since 2003, adopted TCFD frameworks first among Korean manufacturers in 2020, publishes quantified Scope 1/2/3 GHG data with third-party verification (Scope 3 since 2022), and introduced internal carbon pricing in 2024, providing above-average transparency for a heavy industrial peer, though SBTi validation is absent and HyREX commercialisation assumptions remain unverified.
Integrity15%52
Controversies, litigation, pollution, fossil-fuel lobbying, conflict-zone involvement and governance scandals. Higher means cleaner.
IndustriALL documented credible union-busting at POSCO's Turkish plant—courts confirmed unlawful dismissals in 2017 and the company refused mandatory mediation and collective bargaining through 2023—creating a material gap between ESG report claims of union engagement and actual conduct; no major financial fraud or conflict-zone controversies were identified, but the labour record is a meaningful integrity deduction.
Why it's on ClimateTicker
POSCO is one of the world's largest blast-furnace steelmakers, responsible for roughly 71–79 million tonnes of CO₂ annually, making it a significant industrial emitter today. The company has declared net-zero by 2050 and is investing in proprietary hydrogen reduction ironmaking (HyREX) with a 300,000-tonne demonstration plant commissioning targeted for 2028, but commercial deployment is a decade or more away and the core business remains coal-intensive. Investors should treat POSCO as a credible but early-stage decarbonisation transition story—not a clean company—where the gap between current emissions and long-term plans remains enormous.
Commitments & Certifications
Controversy & Greenwashing Watch
Solutions for Our Climate's 2025 report flagged that POSCO International, a key group subsidiary, carries material coal-related climate and financial risks that compound the holding company's overall climate risk profile beyond just steelmaking.forourclimate.org
Turkish courts ruled that POSCO unlawfully dismissed ~80 workers in 2017 for union activity, and the company subsequently refused mandatory government mediation and collective bargaining through 2023, contradicting its own ESG report claims on labour rights.industriall-union.org
POSCO's entire 2050 net-zero plan depends on HyREX being commercialised and on securing economical green hydrogen at scale, neither of which is assured; the demonstration plant won't commission until ~2028, and electricity/power supply for full-scale EAF and HyREX operations has been flagged as an unresolved government-level challenge.kedglobal.com
POSCO's self-set 2030 target of only ~10% absolute reduction from a 2017–2019 baseline is far below what sector science-based pathways require, and the company has not submitted targets to SBTi for independent validation, raising credibility concerns relative to its carbon-neutral marketing.forourclimate.org
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