Carbon credits, explained
Carbon credits are often described as a climate solution. They are also criticised as a loophole that allows polluters to continue business as usual. Both views contain some truth.
To understand whether carbon credits still matter, it helps to look at how they work in practice, where they fail, and why scrutiny around them has intensified.
What a carbon credit actually represents
A carbon credit represents one metric tonne of carbon dioxide or equivalent greenhouse gases that has been avoided or removed from the atmosphere.
Credits are created by projects such as renewable energy installations, forest protection, methane capture, or emerging carbon removal technologies. These credits can then be purchased by companies or individuals to offset emissions they cannot yet eliminate.
In principle, carbon credits are meant to channel money from emitters to climate solutions. In reality, their impact depends entirely on quality and integrity.
How credits move from projects to buyers
The process usually begins with a project claiming emissions reductions compared to a baseline scenario. This might involve preventing deforestation, capturing landfill methane, or removing carbon directly from the air.
Independent third-party auditors then assess whether these reductions are real, measurable, and verifiable. If the project meets recognised standards, carbon credits are issued into a registry, each with a unique identifier.
Once purchased, credits are retired so they cannot be reused. This helps prevent double-counting and ensures each credit is only claimed once.
Two markets, very different rules
Carbon credits operate across two broad systems.
Compliance markets are government-regulated and legally enforced. Companies in regulated sectors must hold allowances or credits to operate, and the rules are tightly controlled.
Voluntary carbon markets allow companies or individuals to purchase credits voluntarily, often to support net-zero or climate-neutral claims. Most public controversy sits within this voluntary space, where oversight has historically been weaker.
Why carbon credits were created in the first place
Carbon credits were designed as a transitional tool. Many sectors cannot eliminate emissions overnight, and carbon finance was intended to fund immediate climate action while longer-term reductions take shape, particularly in developing regions.
In theory, this approach helps mobilise private capital, reduce emissions where it is cheapest to do so, and support early-stage climate solutions. The challenges lie not in the concept itself, but in how it has been applied.
Where the system starts to break down
One of the most debated issues is additionality. If a project had happened anyway without carbon credit revenue, the claimed climate benefit becomes questionable.
Permanence is another concern, especially for nature-based credits. Carbon stored in forests or soils can be released again through fires, logging, or land-use change, sometimes within decades.
There is also leakage, where preventing emissions in one location simply shifts them elsewhere. Measurement adds further complexity. Carbon accounting relies on models and assumptions, and overly generous baselines or weak monitoring can inflate the number of credits issued.
The greenwashing problem
The most visible criticism of carbon credits is greenwashing. Some companies rely on offsets instead of reducing emissions, marketing themselves as carbon neutral while making minimal operational changes.
When credits are used as a substitute rather than a supplement, they risk delaying the transition that climate science says is urgently needed.
Are carbon credits still relevant today?
Yes, but only under stricter conditions.
The market is moving away from cheap, low-integrity credits toward projects that demonstrate real, measurable impact. Transparency, conservative accounting, and long-term climate outcomes are becoming non-negotiable.
Carbon credits are no longer framed as a standalone solution. They are increasingly positioned as a temporary complement to direct emissions reduction.
What higher-quality credits tend to share
High-integrity credits usually show clear additionality, cautious measurement assumptions, and independent verification. There is also growing emphasis on carbon removal, which offers more durable climate benefits than simple emissions avoidance.
Low-quality credits often fail on one or more of these points.
The direction the market is heading
Carbon credits are evolving from a volume-driven market into a quality-driven one. This shift is driven by tighter standards, public scrutiny, and growing pressure on companies to show genuine emissions reductions.
Carbon credits will not solve climate change on their own. Used responsibly, they can support climate action. Used poorly, they risk becoming a distraction.
How carbon credits should be viewed
Carbon credits are neither a silver bullet nor inherently useless. They are a tool, and their value depends on how they are designed and used.
The real challenge is not whether carbon credits should exist, but whether they contribute to real climate progress rather than convenient accounting.
