A new wave of innovation is reshaping how the mining industry approaches waste. CBC News, Canada, reported that researchers in Sudbury, northern Ontario, are developing a bacteria-based technology called bioleaching, which uses naturally occurring microbes to extract valuable metals such as nickel, cobalt, and copper from old mine tailings.
Led by MIRARCO Mining Innovation, the team recently opened a pilot facility in October 2025 to scale up this process, aiming to transform mining waste into a source of critical minerals while cutting emissions, reducing environmental risks, and unlocking billions of dollars in untapped resources.
Sudbury Moves Toward Commercial Bioleaching
Sudbury has a long history of mining, leaving behind massive piles of tailings—the leftover rock and sediment from ore extraction. These materials still hold billions of dollars’ worth of metals, but until now, recovering them was difficult, energy-intensive, and expensive. The bioleaching technology changes that. By using bacteria that naturally digest minerals, scientists can release metals from waste rock without relying on harsh chemicals or high temperatures.
According to Nadia Mykytczuk, CEO of MIRARCO, the new pilot facility represents a shift toward sustainable mining. She precisely mentioned that,
In Sudbury alone, the tailings contain $8 billion to $10 billion worth of nickel. With this facility, we are shaping a new era of mining innovation—one that focuses on clean technology, critical minerals, and preparing the workforce of tomorrow.
The facility connects research, industry, and community partners, creating a hub for applied research in bioleaching and bioprocessing.
Before moving to the new facility, MIRARCO operated within Laurentian University, and the long-standing partnership continues. The pilot center allows researchers to handle larger samples of mine waste and test how bioleaching works at a scale closer to industrial operations. This is essential for proving that the process can be commercially viable in Canada.
Bioleaching Breakthrough: Turning Tailings into Critical Minerals
- The process starts by grinding the mine tailings and mixing them with a nutrient-rich liquid. Scientists then introduce specialized bacteria into the mixture.
- These microbes feed on the minerals, producing chemical reactions that dissolve metals into the liquid.
- The resulting slurry moves through a series of reactors, where the process continues, and metals are eventually collected in a liquid form.
Early experiments are promising. Scientists at MIRARCO have noted that the process can recover 98–99 percent of nickel from the tested tailings. The value surpasses traditional methods that often leave large amounts of valuable minerals behind.
In separate research, scientists are growing and refining the bacteria. Different microbes target specific minerals. Some thrive in acidic conditions, ideal for breaking down sulfide tailings, while others focus on iron oxides or silicate rocks.
This flexibility allows scientists to extract not only common metals like nickel and copper but also rare earth elements and lithium, which are critical for batteries and renewable energy technology.
Environmental and Carbon Benefits
Traditional metal extraction uses energy-intensive methods, including high-temperature processing, chemical treatments, and heavy machinery. This approach produces substantial carbon emissions and generates more waste. Bioleaching operates at ambient temperature and pressure, reducing energy use by an estimated 30–40 percent.
It also tackles the challenge of storing mining waste. Canada produces around 650 million tons of mine tailings every year. Much of this material sits in ponds behind dams, which can be unstable and pose long-term environmental risks.
Significantly, tailings may generate acid or release metals into the environment, and dam failures can have serious consequences. The 2014 Mount Polley mine tailings dam failure incident in British Columbia is a stark reminder of these dangers.
By turning tailings into a source of metals, bioleaching reduces the volume of waste requiring storage, cutting both environmental risk and the legacy costs of old mining sites.
Overcoming Challenges
While promising, the technology is not without hurdles. Processing tailings can be costly, and the bacteria require careful monitoring and specific growth conditions. Scaling up from pilot operations to full commercial production will also need investment in infrastructure and specialized equipment.
Environmental experts, such as MiningWatch Canada, note that tailings can behave unpredictably. They may chemically react over time or shift physically, posing stability concerns. Effective containment and monitoring are critical to ensure the process remains safe at larger scales.
Despite these challenges, researchers are optimistic. Early pilot studies indicate that the bacterial method could recover 65–80 percent of minerals left behind by conventional processing. This is a significant improvement that makes further investment worthwhile.
Fueling Canada’s Clean Energy Future
The technology comes at a crucial time. Global demand for critical minerals is rising as electric vehicles, wind turbines, and solar panels become more widespread. Canada has identified 31 minerals essential for the energy transition, but many are currently imported from regions with supply risks. Bioleaching offers a way to unlock domestic resources while reducing dependence on imports.
The process could provide materials for electric vehicle batteries, grid infrastructure, and industrial applications. Lithium and cobalt can power EVs, rare earth elements like neodymium and dysprosium support wind turbines and other clean energy systems, and copper and nickel are essential for electrical grids.
By recovering these from tailings, Canada could strengthen its supply chains while reducing environmental impact.
By 2040, the IEA expects the value of North America’s energy minerals to grow to around USD 30 billion for mining and USD 14 billion for refining. Mining growth will mainly come from copper in the United States and Mexico, and from lithium and nickel in Canada.
For refining, the region could make up about 4% of the global market, led by copper and lithium refining in the United States and copper and nickel refining in Canada.
Moving Toward Commercial Deployment
MIRARCO aims to transition from pilot testing to full-scale operations in the next two to three years. Globally, bioleaching is already in use at around 30 mining sites, but Canada has yet to deploy it commercially. The pilot facility in Sudbury is helping bridge that gap by testing continuous processing and demonstrating commercial viability.
Government support is also playing a key role. CBC further highlighted that funding through Canada’s Clean Technology Program and provincial innovation grants is helping advance research and development. The technology aligns with national goals to position Canada as a global leader in sustainable critical minerals production by 2030.
Overall, industry analysts predict bioextraction could become commercially viable within three to five years for specific minerals, with broader adoption following as operational experience grows.
The post Bioleaching Breakthrough in Canada: How MIRARCO’s Pilot Facility Turns Mine Waste into Critical Minerals appeared first on Carbon Credits.
What auditors actually test, where projects actually fail, and the contract clauses that protect you before signature.
The meeting happens about fourteen months after the contract was signed. Your assurance provider has reached the nature-based investment line in your Scope 3 file, and the partner across the table has exactly two questions. How do you know the reductions happened? And how do you know they would not have happened anyway?
The first question is MRV: measurement, reporting, and verification. The second is additionality. Between them, they decide whether your nature-based investment counts, in your inventory, in your disclosure, and in front of your board. Everything else in the project documentation is supporting material for these two answers.
This article walks through what each question actually tests, where projects most commonly fail, what digital MRV has changed (and what it has not), and the contract clauses that protect you. The goal is to give you the diligence framework before you sign, because after the credit issues is the wrong time to discover the answers were weak.
What MRV actually verifies
MRV is the machinery that turns a field intervention into a defensible number. Measurement covers the data: biomass surveys, soil sampling, remote sensing, activity records from participating farms. Reporting covers the translation of that data into claimed reductions under a recognised methodology. Verification covers the independent check: an accredited third party tests the reporting against the methodology and the evidence.
The methodologies live in registries. Verra’s Verified Carbon Standard and the Gold Standard are the two largest for nature-based projects, and each publishes the methodology documents, monitoring requirements, and verification protocols that a project must follow. The ICVCM Assessment Framework now sits above the registries, assessing whole methodologies against the Core Carbon Principles and granting the CCP label to those that pass.
For a buyer, the practical questions are concrete. What is the monitoring frequency, and is it specified in the project design document or left vague? Who is the verifier, how were they selected, and how often do they rotate? What raw data do you, the buyer, get access to, and in what format? A project that answers these in writing is a different procurement than one that answers them in a sales call.
What additionality actually proves
Additionality asks whether the intervention caused the reduction, or whether the reduction would have happened anyway. The test is a counterfactual: what would this landscape, this farm, this forest have done without the project’s money?
Three forms matter in practice. Financial additionality asks whether the project needed the carbon revenue to proceed. Regulatory additionality asks whether the activity was already required by law. Common-practice additionality asks whether the activity is already standard in the region, in which case paying for it buys you nothing the world was not getting for free.
The reason additionality dominates audit conversations is recent history. Research published in 2023, including the Science paper examined at length in our piece on conventional offsets and boardroom credibility, found that a large share of REDD+ credits failed the counterfactual test because baselines were inflated. The market response was a wave of methodology revisions at Verra and the arrival of independent ratings agencies whose entire business is re-testing additionality claims. The Carbon Credit Quality Initiative publishes transparent scoring of methodologies on exactly this dimension, and it is free to consult before you sign anything.
Where projects most commonly fail the test
Five failure modes account for most of the wreckage.
- Inflated baselines. The counterfactual assumes more deforestation, more degradation, or lower yields than the evidence supports. The claimed reduction is the gap between reality and the baseline, so an inflated baseline manufactures reductions from nothing.
- Unaccounted leakage. The project protects one forest and the logging moves to the next valley. The methodology is supposed to net this out; weak projects estimate it optimistically.
- Thin permanence protection. Nature-based carbon can reverse: fire, pest, drought, or a change of landowner. Buffer pools and insurance mechanisms exist for this, but their adequacy varies enormously between projects.
- Attribution and double counting. In supply chain settings, the same reduction can be claimed by the supplier, the buyer, and a credit purchaser unless contracts prevent it. Our Insetting vs Offsetting piece covers the inventory rules; the point here is that the auditor will ask who else is counting this tonne.
- Stale monitoring. Data collected at validation and never refreshed. The IPCC AR6 Working Group III land-sector chapter documents how quickly carbon stocks respond to disturbance; a three-year-old measurement is a historical artifact, not a current claim.
What digital MRV changes, and what it does not
Digital MRV is the genuine improvement in the field. Satellite remote sensing, including the free archives at NASA Earthdata, allows biomass and land-cover change to be monitored continuously rather than at multi-year verification intervals. Soil carbon models calibrated with physical sampling reduce the cost of agricultural measurement. The practical effect is more frequent data at lower cost, which compresses the window in which a problem can hide.
What digital MRV does not change is judgment. Baselines are still human decisions about counterfactuals. Additionality is still an argument, not a measurement. Research groups such as the Oxford Smith School have been clear on this point: better sensors improve the M in MRV, but the integrity questions live in the assumptions, and assumptions need governance, not gadgets.
For a buyer, the test is simple. Ask the provider what is measured by instrument, what is estimated by model, and what is assumed by methodology. A provider who can answer that question crisply understands their own evidence chain. A provider who cannot is selling you their confidence rather than their data.
What to require in your contract
The diligence above converts into five contract clauses.
- Monitoring cadence and buyer data access, specified by dataset and frequency.
- Verifier independence, named accreditation, and rotation terms.
- Baseline revision triggers, so the counterfactual updates when the methodology or the evidence changes.
- Reversal liability and buffer adequacy, with the mechanism named and sized.
- Documentation handover in audit-ready form, so the evidence file your assurance provider needs already exists.
None of these clauses is exotic. All of them are absent from weak contracts, and their absence is the most reliable early signal that the MRV and additionality answers will be weak too.
If you are evaluating a nature-based investment and want the MRV and additionality stress-tested before signature rather than after, the carbon and sustainability experts at Carbon Credit Capital can run that review against any project on your shortlist, and design nature-based supply chain investments where the evidence chain is built audit-first. Schedule a consultation.
Sources and further reading
- ICVCM: Core Carbon Principles Assessment Framework
- Verra: Verified Carbon Standard
- Gold Standard for the Global Goals
- Carbon Credit Quality Initiative: Methodology quality scores
- University of Oxford Smith School: Sustainable finance research
- IPCC AR6 Working Group III, Chapter 7: AFOLU
- NASA Earthdata satellite remote sensing archive
EU Directive: Empowering Consumers for the Green Transition (ECGT)
The EU Directive, Empowering Consumers for the Green Transition (ECGT), takes effect on September 27, 2026.(1) The goal of ECGT is to protect consumers by ensuring that environmental claims are fair, understandable, and reliable. This regulation does create a new compliance requirement for businesses, but it also provides sustainability and marketing teams with important guidance that helps create consistency in sustainability communications.
Key takeaways
- ECGT takes effect September 27, 2026, and prohibits claims that a product or service has a neutral, reduced, or positive environmental impact based on offsetting alone.
- Named example phrases the regulation prohibits include climate neutral, CO2 neutral certified, carbon positive, climate net zero, climate compensated, reduced climate impact, and limited CO2 footprint.
- ECGT does not want to deter investment in carbon credits. It wants companies to communicate the real benefits of the projects they support instead.
- SBTi’s guidance recommends framing carbon credits as taking responsibility for ongoing emissions, not as making a product or company neutral.
- Voluntary carbon projects deliver real climate progress: reducing super-pollutants, protecting and restoring ecosystems, and supporting communities.
Regarding carbon credits specifically, voluntary carbon projects deliver important climate progress and environmental benefits that provide many talking points for companies. They reduce climate super-pollutants by removing industrial emissions like methane, N2O, HFCs and others. They protect and restore valuable ecosystems and carbon sinks like forests, mangroves and grasslands. They help communities by reducing local pollution, creating employment opportunities, improving access to healthcare, and more.
The Science Based Targets Initiative (SBTi), a global leader in business climate action, concludes that alongside aggressive decarbonization, we should also use high quality carbon credits to take responsibility for our ongoing emissions. SBTi recognizes that carbon credits are important “to help limit temperature overshoot, mitigate transition risks, and support climate solutions.”(2)
ECGT language on carbon offsetting says that they do not want to deter investment in carbon credits. They just want companies to focus on communicating the benefits of the projects they support and avoid claims beyond the scope of carbon credits, which is good for everyone, companies and consumers alike.
The regulation reinforces that carbon credits do not change the sustainability of your products, so carbon credit buyers should not suggest that their products are more sustainable because of carbon credits. Instead, companies need to promote their climate contributions as a way to compensate or take responsibility for their carbon emissions by supporting projects that do great things like reducing global carbon emissions, reducing pollution, preventing deforestation, restoring forests, and more.
ECGT language related to carbon offsetting
The regulation is particularly focused on prohibiting claims, based on offsetting greenhouse gas emissions, that a product or service has a neutral, reduced, or positive impact on the environment in terms of greenhouse gas emissions. These claims are prohibited in all circumstances because they mislead consumers into believing the claim relates to the product itself, or to how it was made and supplied, or into thinking that using the product carries no environmental impact at all.
Named examples of prohibited claims include:
- climate neutral
- CO2 neutral certified
- carbon positive
- climate net zero
- climate compensated
- reduced climate impact
- limited CO2 footprint
These claims are only allowed when they rest on a product’s actual lifecycle impact, not on offsetting emissions outside that product’s value chain, since the two are not equivalent. This prohibition does not stop companies from advertising their investments in environmental initiatives, including carbon credit projects, as long as they present that information in a way that is not misleading and that meets the other requirements of Union law.(1)
SBTi also provides guidance on climate contribution language in its Corporate Net Zero Standard Version 2.0 Draft for Second Public Consultation, November 2025. While the SBTi language is fairly technical, it has a good framework for crafting a climate contribution message.
SBTi Language for Carbon Credits(3)
- Take responsibility for ongoing emissions by delivering mitigation impact contributions
- Carbon credits certify the mitigation outcomes of projects that reduce, avoid, or remove carbon emissions
- Activities that reduce emissions from emission sources not located within the company’s value chain
- Activities that conserve, protect, and enhance natural carbon sinks
- Activities that capture and store carbon in storage pools
SBTi’s draft standard also walks through sample claim language for this kind of contribution. In general, the samples move from a simple percentage statement, to naming a specific verified tonnage tied to that percentage, to a fuller statement that breaks the tonnage into reductions versus removals. Across all three, the framing stays consistent: a company took responsibility for a defined share of its ongoing emissions over a set period, by funding a specific, verified amount of mitigation, achieved through emission reductions or removals.(3)
FAQ: ECGT and Carbon Credit Claims
When does the ECGT directive take effect?
The rules apply across the EU from September 27, 2026, after member states transposed the directive into national law by March 27, 2026.
Does ECGT ban carbon offsetting?
No. It bans specific marketing claims that a product or service is environmentally neutral, reduced impact, or positive based on offsetting. Advertising investment in carbon credit projects themselves is still allowed if it is not misleading.
What phrases does ECGT specifically prohibit?
Named examples include climate neutral, CO2 neutral certified, carbon positive, climate net zero, climate compensated, reduced climate impact, and limited CO2 footprint, when those claims are based on offsetting rather than a product’s actual lifecycle impact.
How should a company describe its carbon credit purchases instead?
SBTi’s guidance recommends stating the specific verified tonnage of emissions reductions or removals funded and describing that as taking responsibility for a defined share of ongoing emissions, rather than claiming the company or product is neutral.
Does this rule apply to company level sustainability claims too?
ECGT is focused on claims about specific products and services in consumer marketing. Broader company level sustainability communication is a separate matter still governed by other existing rules.
While ECGT does add a new compliance burden for businesses, it helps create consistency in sustainability messaging that is important to building confidence in voluntary carbon projects and scaling the industry to help us achieve progress on global carbon emissions.
Disclaimer: Terrapass does not provide legal or regulatory advice. Any interpretation of regulation must be approved by your legal representative.
References:
(1) https://eur-lex.europa.eu/eli/dir/2024/825/oj
(2) https://files.sciencebasedtargets.org/production/files/Corporate-Net-Zero-Standard-version-2.pdf
(3) https://files.sciencebasedtargets.org/production/files/CNZS-V2-Second-Consultation-Draft.pdf
The post The EU’s New Green Claims Rules and Carbon Credits appeared first on Terrapass.
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