The BHP Files: World's Biggest Miner Quietly Kills Its Climate Promises

TL;DR

• Leaked internal documents reveal BHP shelved board-approved solar projects, delayed its landmark 500MW renewables plan past 2031, scrapped an iron ore plant that would have cut 1.7 million tonnes of CO₂ annually, and continued buying $500M+ in diesel trucks.
• A May 2025 internal memo explicitly stated the company's decarbonisation plan had a "low probability of success" and that "the urgency to source renewables generation and storage services by 2030 has diminished."
• BHP was aware that delayed climate action posed a "reputational risk" and that "urgent decarbonisation in line with BHP's public commitments" effectively underpinned its "licence to operate."
• Australia's national emissions targets — including a 43% cut below 2005 levels by 2030 — may now be in doubt, according to analysts.
• The pattern is structural, not accidental. This is not one project slipping. It is a coordinated retreat across solar, wind, battery storage, processing technology, and fleet electrification — all while BHP's public statements remain unchanged.

What Happened

On Monday, The Guardian and the ABC's Four Corners published an explosive investigation based on a cache of internal BHP documents — dubbed "The BHP files" — leaked to both outlets. The documents reveal that BHP, the world's largest mining company and one of Australia's biggest historic emitters, has systematically halted, delayed, or quietly killed key decarbonisation projects across its Western Australian iron ore operations in the Pilbara.

The investigation, by Christopher Knaus and Adam Morton, details four specific findings:

1. The Jimblebar solar farm was shelved after board approval. BHP's first planned investment in its inland Pilbara decarbonisation plan — a 50-megawatt solar farm and 20MW battery at its Jimblebar mine — was effectively killed soon after being approved and funded by the board in mid-2023. The move prompted internal criticism from staff, some of whom questioned the decision to unilaterally close a board-approved project.

2. The landmark renewables project has been pushed past 2031. A planned system of almost 500MW of solar, wind, and battery storage — enough to power a small city and supply up to 70% of the energy for BHP's inland iron ore operations — has been given no capital funding until 2031 at the earliest. The initial plan was for it to deliver first power from December 2027. Documents show it will "not progress in its current form."

3. An emissions-cutting processing plant was scrapped. BHP quietly dumped plans for an iron ore processing facility that could have prevented 1.7 million tonnes of emissions per year — equivalent to taking more than 350,000 cars off the road. This was despite describing it as "well-aligned" with its climate transition action plan, which shareholders had voted overwhelmingly to support.

4. Diesel trucks keep rolling in. The company had initially planned to begin replacing its diesel haulage fleet — one of its biggest emissions sources — with electric trucks starting in 2027-28. Instead, documents show it has continued acquiring polluting diesel trucks for long-term use, including a purchase of more than $500 million for new diesel trucks at Jimblebar. Public documents also suggest plans to use diesel trucks at a proposed new mine at Ministers North.

What It Actually Means

This is not a story about one company missing its targets. It is a story about the gap between corporate climate rhetoric and corporate capital allocation — and about what happens when those two things are allowed to diverge without consequence.

BHP has spent years repositioning itself as an industry leader on climate. In 2019, its then-CEO Andrew Mackenzie said fossil fuel dependence posed "existential" risks and that tackling climate change would require "the biggest global mobilisation since World War II." The company set a target to cut emissions by 30% by 2030 and reach net zero by 2050. Shareholders voted overwhelmingly in favour of its climate transition action plan.

The leaked documents show that, within six years of Mackenzie's declaration, the company was internally war-gaming options that would push major climate investments into the 2030s or 2040s — or simply take no action at all.

The May 2025 memo is the smoking gun. It states that BHP no longer considered its current decarbonisation plan achievable, claiming it had a "low probability of success" and blaming slow technological advancement by truck manufacturers. It then contemplates delaying electrification of truck and rail fleets until 2035 or 2040, with a third option to simply do nothing.

The memo does not propose accelerating investment to close the gap. It proposes accepting the gap and slowing down.

Hype Deconstruction

BHP's defence, as stated to The Guardian, is that "many of the technologies the resources industry will need to achieve net zero are not yet ready to be deployed" and that "no Australian mining operation is currently utilising critical 240-ton battery-electric haul trucks as the technology is not advanced enough to scale to an operational fleet."

There is some truth here. Battery-electric haul trucks at that scale are not yet commercially deployed at Pilbara-operating-condition levels. The Chamber of Minerals and Energy of Western Australia notes that "there is currently no mining operation anywhere in the world with the scale, complexity and operating conditions of the Pilbara running a fully electrified haulage fleet."

But this defence collapses under scrutiny on two fronts:

First, the technology-readiness argument does not explain shelving a board-approved 50MW solar farm and 20MW battery. Solar and battery storage are mature, commercially deployed technologies. That decision was not about technology readiness. It was about capital allocation.

Second, the argument that technology isn't ready is self-fulfilling when the world's largest miner — with the purchasing power to shape the market — chooses to buy $500 million in new diesel trucks instead of accelerating electric trials. As Naomi Hogan of the Australian Centre for Corporate Responsibility put it: "Remaining hooked on expenditure for diesel trucks and pointing to technology delays demonstrates BHP and Rio Tinto are taking a back seat on decarbonisation."

Stakeholder Landscape

Who loses:

• Australia's emissions targets. Tim Buckley of Climate Energy Finance: "BHP is fundamentally putting Australia's emissions targets at risk. It's the single biggest company in Australia, and its annual report shows its emissions going up between fiscal year 2025 and fiscal year 2030."
• BHP shareholders who voted for the climate transition plan in good faith, only to discover the company was internally walking away from it.
• The Pilbara communities and ecosystems that bear the environmental cost of continued diesel-powered operations.
• Technology development. Big miners are not mere "participants" in the energy transition, Hogan argues. "They can help shape it through their scale and purchasing power." By stepping back, BHP slows the entire ecosystem.

Who benefits (in the short term):

• BHP's near-term balance sheet. Delaying capital expenditure on decarbonisation preserves cash flow and dividends.
• Diesel truck manufacturers who continue to receive orders.
• Competitors who are investing. Fortescue, for instance, has been aggressively pursuing green hydrogen and electrification. If BHP retreats, Fortescue's early-mover position strengthens.

Who is watching:

• Regulators. The documents show BHP was internally aware that delayed climate action posed a "reputational risk" and that decarbonisation underpinned its "licence to operate." Those words, in a leaked internal document, will be read carefully by regulators and politicians.
• Institutional investors with ESG mandates. The gap between what shareholders voted for and what management executed is the kind of gap that triggers governance reviews.

Cross-Layer Implications

Geopolitics. Australia is the world's largest iron ore exporter. If BHP — and by extension the Pilbara — fails to decarbonise, Australia's ability to meet its Paris Agreement commitments comes under direct pressure. That has diplomatic consequences, particularly with Pacific Island nations and European trading partners who are increasingly linking trade access to climate performance.

Commodity markets. The investigation notes that BHP's continued diesel truck purchases and delayed electrification signal long-term fossil fuel demand in mining. That has implications for oil demand forecasts and for companies betting on mining-sector electrification as a growth market.

Corporate governance. This is a case study in the limits of shareholder climate activism. BHP's shareholders voted for the climate plan. The board approved the Jimblebar solar project. Neither mechanism stopped the retreat. The question now is whether institutional investors — many of whom have made net-zero pledges of their own — will act on the gap between BHP's public commitments and its internal decisions.

Technology development. If the world's largest miner concludes that electric haulage isn't ready and stops pushing, the market signal to equipment manufacturers is clear: don't rush. That slows the entire technology development curve for mining electrification globally.

What This Means for You

If you are an Australian voter or taxpayer: BHP's emissions trajectory directly affects whether Australia meets its national climate targets. The company is the single largest contributor to the country's industrial emissions profile. If BHP's emissions rise between 2025 and 2030 — as its own annual report projects — other sectors will need to cut deeper to compensate, or the targets will be missed.

If you are an investor with BHP exposure: The gap between public commitments and internal execution is a governance red flag. The documents show the board approved a project that management subsequently shelved. That is not a strategy disagreement. That is a breakdown in board-level oversight of capital allocation against stated strategy.

If you work in mining, energy, or heavy industry: The BHP files are a warning about the gap between corporate climate pledges and the capital allocation decisions that actually determine emissions. If your organisation has made net-zero commitments, ask: where is the capital to back them? If the answer is "after 2030," you may be looking at your own version of the BHP files.

If you are a consumer or citizen: The Pilbara's iron ore feeds the steel mills that build the world's cities, bridges, and infrastructure. The carbon intensity of that steel is, in part, determined by decisions made in BHP's Perth headquarters. This is not a local story. It is a global supply-chain story.

Uncertainty Ledger

• BHP's response. The company says it remains focused on its emissions goals and has reduced emissions by 36% on 2020 levels. It points to trials of battery-electric trucks and rail, and notes that 30% of its Port Hedland operations are solar-powered. Whether these represent genuine progress or selective disclosure will be tested in the coming weeks.
• Shareholder reaction. No major institutional investor had commented publicly at the time of publication. Whether this triggers proxy battles, divestment campaigns, or governance reviews remains to be seen.
• Regulatory response. The Australian government has not yet commented on whether BHP's delayed decarbonisation affects national emissions projections.
• Technology timeline. If battery-electric haulage technology advances faster than BHP's internal projections assume, the company's decision to continue buying diesel trucks will look like a costly misjudgment in retrospect.

Bottom Line

BHP told its shareholders, the Australian public, and the world that it was leading on climate. Its internal documents show it was retreating. The board approved a solar farm; management shelved it. The company set a 2030 emissions target; its own projections show emissions rising. The gap between what BHP says and what BHP funds is no longer a matter of interpretation — it is documented in the company's own memos. The question now is whether anyone with the power to close that gap — shareholders, regulators, politicians — will actually do so.

Sources: The Guardian / ABC Four Corners "The BHP Files" investigation (Tier 1); BHP corporate statements (Tier 1); Climate Energy Finance analysis (Tier 2); Australian Centre for Corporate Responsibility (Tier 2); Chamber of Minerals and Energy of Western Australia (Tier 2); Mandala Partners emissions analysis (Tier 2).