What is Afforestation?

What Are Avoided Emissions, and How Are They Different From Actually Removing Carbon?

The most common type of carbon credit, and one of the most misunderstood

Walk through a carbon marketplace and you'll encounter plenty of credits linked to renewable energy, forest conservation, methane capture, and other projects designed to prevent greenhouse gas emissions.

But there is an important distinction that often gets overlooked: preventing an emission is not the same as removing carbon that is already in the atmosphere.

That difference is at the heart of avoided emissions.

Avoided emissions credits represent climate benefits that occur because a project prevents emissions that otherwise would have happened. Carbon removal credits, by contrast, represent the physical removal of carbon dioxide from the atmosphere.

Understanding the difference matters for companies buying carbon credits, sustainability teams developing climate strategies, and investors evaluating carbon-market assets.

What Are Avoided Emissions?

Avoided emissions are greenhouse gas emissions that do not enter the atmosphere because a project uses a cleaner alternative to what would otherwise have happened.

Some common examples include:

• Renewable energy replacing fossil-fuel-based electricity
• Forest conservation preventing deforestation
• Cleaner cookstoves reducing fuel consumption
• Methane capture preventing methane from entering the atmosphere

The calculation is comparative.

A project establishes a baseline scenario — an estimate of what would have happened without the project — and compares it with the emissions generated by the actual project.

The difference between these two scenarios represents the project's avoided emissions, generally expressed in tonnes of carbon dioxide equivalent (tCO₂e).

This makes the baseline extremely important. If the baseline assumes more emissions than would realistically have occurred, the project could appear to deliver a larger climate benefit than it actually does.

Avoided Emissions vs. Carbon Removal

This is the distinction buyers need to understand most clearly.

Avoided emissions

Avoided emissions prevent future emissions from occurring.

Think of a tap flowing into a bathtub. Avoidance turns the tap down. Less water enters the tub, but the water that is already there remains.

A wind farm replacing fossil-fuel electricity or a forest protection project preventing planned deforestation are examples of this approach.

Carbon removal

Carbon removal takes CO₂ that is already in the atmosphere and stores it for a meaningful period.

Using the same bathtub analogy, removal is like pulling the plug. The amount of water in the tub actually goes down.

Examples include:

• Reforestation and afforestation
• Biochar
• Direct air capture
• Certain forms of soil carbon sequestration
• Other engineered or nature-based carbon removal approaches

The difference matters because the two types of credits address different climate problems. Hestiya's own explanation of carbon-credit types similarly distinguishes avoidance projects from removal projects and notes that avoidance prevents additional emissions rather than removing CO₂ already in the atmosphere.

Why the Difference Matters for Climate Claims

Avoided emissions and removals should not automatically be treated as interchangeable.

A company using avoidance credits is supporting a project that prevents emissions compared with a baseline scenario. A removal credit represents physical extraction of CO₂ from the atmosphere.

This distinction becomes especially important when companies communicate their climate claims.

Internal emissions reductions should remain at the centre of a credible decarbonization strategy. Carbon credits can play a supporting role, particularly for emissions that are difficult to eliminate immediately, but they should not become a substitute for reducing emissions within the company's own operations and value chain.

For a broader discussion of how businesses can integrate carbon credits into a credible climate strategy, Hestiya's guide on using transparency to strengthen carbon-credit strategies provides useful context on credit types, verification, project documentation, and due diligence.

Where Most Avoided Emissions Credits Come From

Avoidance and reduction projects make up a substantial share of today's voluntary carbon market.

Common project categories include:

Renewable energy

Solar, wind, and hydropower projects can generate electricity that displaces electricity that would otherwise have come from more carbon-intensive sources.

The climate benefit depends heavily on the baseline. If the alternative electricity source is highly carbon-intensive, the potential avoided emissions may be greater than in a market where the grid is already rapidly decarbonizing.

Forest conservation

Forest conservation projects seek to prevent deforestation or land conversion that would otherwise release stored carbon.

These projects can also provide biodiversity and community benefits, but their carbon calculations depend heavily on assumptions about future land-use change.

Cleaner cookstoves

Traditional cooking methods can consume large amounts of fuel. Cleaner and more efficient cookstoves can reduce fuel consumption and associated emissions.

Methane capture

Projects can capture methane from landfills, wastewater systems, or other sources and destroy or use it rather than allowing it to enter the atmosphere.

Each project type has a different emissions profile, methodology, baseline, and risk profile. Buyers should therefore assess the specific project rather than assuming that every credit within a category has the same quality.

How Are Avoided Emissions Calculated?

The underlying calculation can be expressed simply:

Avoided emissions = baseline emissions − project emissions

The challenge lies in determining both numbers accurately.

Step 1: Establish the baseline

The project estimates what would have happened without the intervention.

For example, would a region have continued using diesel generators? Would a forest have been cleared? Would a landfill have released methane?

Step 2: Measure the actual outcome

The project measures emissions associated with the activity that actually took place.

Step 3: Calculate the difference

The baseline emissions are compared with the project's actual emissions.

The difference becomes the estimated avoided emissions.

The difficult part is usually the first step. A baseline describes a counterfactual future, so it cannot be directly observed. That is why baseline methodology, assumptions, monitoring, and verification matter so much.

Why Baseline Inflation Is a Major Risk

One of the biggest risks associated with avoided emissions credits is baseline inflation.

If a project assumes that a large amount of emissions would have occurred without it, the resulting avoided emissions figure becomes larger.

Consider a solar project in a region where electricity is currently generated mainly from diesel generators.

If the project assumes that diesel generation would continue for 20 years, its calculated avoided emissions could be substantial.

But what if the government already has firm plans to connect the region to a lower-carbon national grid within five years?

The original baseline would overstate the amount of diesel generation that would actually have occurred. The project's genuine avoided emissions would therefore be lower.

The physical solar facility has not changed. The baseline has.

That is why buyers need to look beyond the headline number of tonnes of CO₂e and understand the assumptions behind it.

Avoided Emissions and Additionality

Avoided emissions are closely connected to additionality, but they are not the same thing.

Additionality asks whether the project's climate benefit would have happened without carbon-credit revenue.

Baseline analysis asks what would have happened without the project.

Both questions matter.

A project might calculate its baseline correctly but still face an additionality problem if it would have been developed without carbon finance.

Conversely, a project might have a strong additionality argument but use an unrealistic baseline that exaggerates its climate benefit.

For a deeper explanation, Hestiya's article on what makes a carbon credit truly investable discusses additionality, baseline assumptions, verification, leakage, data quality, and traceability as important factors in evaluating carbon assets.

How Carbon Market Buyers Can Evaluate Avoided Emissions Credits

If you're considering avoided emissions credits, several questions are worth asking before purchasing.

1. How was the baseline established?

Look at the methodology, assumptions, historical data, and evidence supporting the baseline.

2. Is the baseline realistic today?

A methodology or assumption that made sense several years ago may no longer reflect current market conditions.

3. Has the project been independently verified?

Third-party validation and verification can provide an important layer of assurance.

4. Is the project additional?

Ask whether carbon finance was actually necessary for the project to proceed.

5. What is the leakage risk?

This is particularly important for forestry and land-use projects. Preventing an activity in one location does not necessarily eliminate the underlying activity if it simply moves somewhere else.

6. Can the credit be traced?

Buyers should be able to understand the project's origin, ownership history, issuance information, and retirement status.

Hestiya's methodology states that projects are assessed for additionality, permanence, transparency, co-benefits, and alignment with recognized integrity principles, with project documentation, monitoring reports, issuance data, and verification records considered as part of the assessment.

How a Digital Carbon Marketplace Can Help

As carbon markets grow, buyers need more than access to credits. They need information that helps them evaluate what they are purchasing.

A Digital Carbon Marketplace can bring project information, available environmental assets, and transaction infrastructure into a more accessible environment.

Hestiya's Marketplace provides access to carbon commodities and I-RECs and is designed around transparency and traceability.

For organizations participating in carbon markets, a Carbon Trading Platform can provide access to available projects and environmental assets.

A Carbon Market Exchange Platform can help connect buyers and sellers, while a Carbon Market Trading Platform can support participation in a market where project type, geography, vintage, quality, and pricing all influence purchasing decisions.

For companies using credits as part of broader climate strategies, a Carbon Offset Platform can also provide a route to sourcing credits, subject to appropriate project-level due diligence.

The important point is that market infrastructure should not replace due diligence. It should make that due diligence easier.

Why Carbon Market Intelligence Matters

Avoided emissions credits cannot be evaluated by project documentation alone.

Market conditions also matter.

Carbon credit prices vary according to project type, geography, vintage, methodology, quality attributes, supply, and buyer demand. Understanding these variables can help sustainability and procurement teams make better-informed decisions.

Hestiya Intelligence provides Carbon Market Intelligence covering carbon-market data, I-REC pricing, project information, and market trends.

A Real Time Global Carbon Credit Pricing view can help buyers understand current market conditions, while a Live I-REC Price Tracker provides visibility into renewable energy certificate pricing.

For organizations assessing broader market movements, Global Carbon Market Analytics can provide additional context around carbon-market trends and pricing.

These tools are particularly useful when combined with project-level analysis. A market price can tell you what an asset costs; it cannot, by itself, tell you whether the underlying avoided emissions claim is credible.

Avoidance, Removal, and the Role of Internal Emissions Reduction

The strongest climate strategies generally distinguish between three different activities:

• Internal emissions reduction: Reducing emissions within a company's operations and value chain.
• Avoidance projects: Supporting activities that prevent emissions that would otherwise have occurred.
• Carbon removal: Physically removing CO₂ from the atmosphere and storing it.

These are complementary, not interchangeable.

Companies should first understand their own emissions profile, identify opportunities to reduce emissions, and then determine where carbon-market instruments can appropriately support their wider climate strategy.

For nature-based projects in particular, Hestiya's article on reforestation and the role of nature-based carbon removal explains why emissions reduction and carbon removal serve different functions and why businesses need a credible emissions baseline before using removal credits.

The Bottom Line

Avoided emissions are a major part of today's carbon market. They represent emissions that did not enter the atmosphere because a cleaner or lower-emission alternative was implemented.

But avoidance is not removal. Avoidance prevents additional emissions from occurring. Removal takes CO₂ already in the atmosphere and stores it.

The distinction is more than terminology. It affects how credits are evaluated, what climate claims they can support, and how companies should incorporate them into broader decarbonization strategies.

For buyers, the key is to look beyond the number of tonnes on a credit. Examine the baseline. Assess additionality. Check verification and leakage risks. Understand the project context. And make sure the credit can be traced through its lifecycle.

As carbon markets mature, quality and transparency will matter increasingly alongside price and volume. Reliable market infrastructure, project-level due diligence, and access to timely market data can help buyers make more informed decisions.