BHP scores 3 points higher than Rio Tinto on SINK's sustainability index.
BHP is more sustainable according to SINK's open sustainability index, scoring 23/100 vs Rio Tinto's 20/100 — a difference of 3 points.
Rio Tinto scores 20/100 on the SINK sustainability index (Significant gaps). Rio Tinto reports comprehensive operational emissions data but remains the highest Scope 1 & 2 emitter among mining peers globally. The company has no Scope 3 reduction target despite Scope 3 representing 95% of emissions and rising since 2020. Active anti-climate lobbying contradicts public commitments; the Juukan Gorge destruction and multiple regulatory violations expose systemic environmental and cultural harm.
BHP scores 23/100 on the SINK sustainability index (Significant gaps). BHP reports comprehensive climate data with verified operational emissions reductions, but Scope 3 emissions—97% of total—lack absolute reduction targets. The 2015 Samarco dam disaster killed 19 people and contaminated 600km of river; BHP faces £36 billion UK litigation. Industry association misalignment on climate policy undermines stated commitments.
Both companies are rated on the same 10-question SINK rubric: Scope 1/2/3 carbon footprint, energy source, nature and biodiversity, resource use, water, emissions trajectory, science-based targets, transparency, and controversies. Scores are 0–100, based on public data, and fully reproducible.
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