What Evidence Do You Need To Back Your Environmental Marketing Claims?

Disclaimer: This article provides general marketing information and is not legal advice. Always have your legal compliance department approve your marketing messaging.

Environmental marketing claims such as "sustainable," "eco-friendly," "green," "carbon-neutral," "recyclable," and "biodegradable" communicate more than just your corporate values. They make factual or implied statements about your products, operations, or environmental performance. So all of these terms required evidence.

The Federal Trade Commission (FTC) states that environmental marketing claims must be 'truthful, clear, and supported' before they appear in advertising. Further, the FTC Green Guides explain how the agency applies federal truth-in-advertising standards to environmental claims made through 'websites, product labels, packaging, social media, sales materials, and other marketing channels.' For sustainability leaders, FTC guidelines create a clear marketing requirement: 

Your environmental message should never be stronger than the evidence supporting it.

What Are Environmental Marketing Claims?

An environmental marketing claim is any statement that tells your audience a product, process, or company has an environmental benefit. Some environmental marketing claims are direct. You may describe a package as recyclable, a facility as energy efficient, or a product as made with recycled content. Other claims are implied through graphics, certifications, and the surrounding marketing language. Common environmental marketing terms include:

• Biodegradable

• Carbon neutral

• Compostable

• Eco-friendly

• Energy efficient

• Environmentally friendly

• Green

• Low carbon

• Made with recycled content

• Net zero

• Non-toxic

• Plastic free

• Recyclable

• Renewable

• Responsibly-sourced

• Sustainable

• Zero waste

These marketing claims create a specific expectation in the buyer’s mind. “Recyclable” suggests the product can be recycled at the end of its lifecycle. “Carbon neutral” suggests the associated greenhouse gas emissions have been measured and addressed.

“Sustainable” may imply broad environmental benefits across materials, manufacturing, and use. The broader the term, the broader the impression you may need to substantiate.

An environmental claim also does not need to appear in a sustainability report or environmental, social, and governance disclosure. It can appear in:

• Product packaging

• Advertisements

• Sales presentations

• Proposals

• Product icons

• Certification marks

• Photography and graphics

By law, the FTC also evaluates the overall impression created by the claim. So they can still consider a technically accurate claim “misleading” when the surrounding imagery or language suggests a broader environmental benefit than your evidence supports. For example, a package may contain 30% recycled material. You can make that specific claim when you have the records to support it. Calling the entire package “environmentally-friendly” creates a much broader message. Buyers may reasonably interpret it to mean the package has few or no negative environmental impacts.

In application, you need to identify exactly what environmental benefit you are claiming, where it applies, and what your audience is likely to believe after seeing the complete marketing message.

Why Broad Environmental Claims Carry More Risk

Broad claims such as “green,” “sustainable,” and “environmentally friendly” are difficult to substantiate because the FTC states they may 'imply that a product has no negative environmental impact.' For example, a product may use recycled materials while consuming substantial energy during manufacturing. Also, a package may be technically recyclable but not accepted by most recycling facilities. 

Therefore, the FTC advises marketers to avoid general environmental claims. Instead, they recommend making your claims more defensible and identifying the specific environmental benefit and its limits. For example, instead of saying:

“Our sustainable packaging protects the planet.”

Use:

“Our packaging contains 80% post-consumer recycled fiber by weight.”

The second claim tells the customer:

1. What changed

2. Which part of the product changed

3. How the benefit was measured

4. What evidence should exist behind the statement

Specificity improves both environmental claims compliance and marketing performance. Regulators will not flag you for overstated claims, and your customers get a concrete reason to believe you.

What Evidence Must Support Your Environmental Claims?

The required evidence depends on your exact claim. A good rule of thumb is that strong substantiation usually includes several forms of documentation rather than one isolated statistic. Here are ten types of evidence that may back your environmental claims: 

1. A Clearly Defined And Provable Claim

Before collecting evidence, define exactly what your marketing statement means. Your internal team should be able to answer:

• Does the claim apply to the product, packaging, company, or facility?

• Does it cover a single environmental attribute or the entire lifecycle?

• Does it apply globally or only in certain markets?

• Does it compare current performance with a previous product?

• Does it compare your product with a competitor?

• Is the statement based on measured results, estimates, certifications, or future goals?

• What period does the claim cover?

“Made with renewable energy” may refer to a single factory, a single production line, or the entire manufacturing process. Those are all materially different claims. Your marketing copy must reflect the actual boundary of the evidence.

2. Competent And Reliable Scientific Evidence

Environmental claims involving technical, health, or performance questions generally require 'competent and reliable scientific evidence.' Depending on the claim, that evidence may include:

• Laboratory or field testing

• Engineering analysis

• Emissions calculations

• Material composition records

• Supplier documentation

• Lifecycle assessment

• Waste audits

Further, the methodology should be appropriate for the claim and applied consistently. Evidence should always exist before the environmental claim is published, not after a customer, regulator, or attorney challenges it. The FTC routinely takes enforcement action against companies making unsupported claims that products are biodegradable, compostable, or recyclable. It is essential to be clear on your advertised environmental impact. 

3. A Relevant Lifecycle Boundary

A product can be better for the environment in one area, such as production, without being sustainable across its entire lifecycle. A lifecycle assessment looks at the full picture, including:

1. Raw material extraction

2. Material processing

3. Manufacturing

4. Transportation

5. Product use

6. Maintenance

7. End-of-life disposal, recycling, or recovery

The National Institute of Standards and Technology (NIST) defines a life cycle assessment as a scientific method for measuring the environmental impacts throughout the life cycle of a product or service. NIST also notes that transparent lifecycle assessments help producers substantiate product sustainability claims.

However, every environmental claim requires a complete life cycle assessment. Your evidence needs to match the breadth of the statement. For example, a claim about reducing factory electricity use may require energy records. While a claim that one product is environmentally preferable overall may require a much broader comparative assessment.

4. Provide Baseline and Comparison Data

Environmental claims such as “20% less carbon emissions” or “produces less waste" need to be supported by:

• The baseline

• The comparison product or process

• The measurement period

• The units used

• The calculation method

• Any exclusions

• Any material operational changes

• Whether the comparison reflects normal use

Avoid comparing a new product to an outdated model that customers no longer use unless you clearly state the distinction. A comparison must also address the same functional outcome. A product that uses less material but fails sooner may not deliver the environmental benefit suggested by the advertising.

5. Greenhouse Gas Inventory Data

Carbon-related claims require more than a general estimate of your company’s emissions. You need a defined greenhouse gas inventory and a defensible accounting method that shows which emissions were measured, which operations were included, and where the data came from. First, you need to understand the three categories of emissions used in greenhouse gas accounting.

The Environmental Protection Agency defines emissions in three categories:

1. Scope 1 emissions are the direct emissions from sources that an organization owns or controls.

2. Scope 2 emissions are a company's indirect emissions from sources such as purchased electricity, heat, or cooling.

3. Scope 3 covers a business's value chain emissions, such as those from purchased materials and product disposal.

Before using claims such as “low carbon,” “carbon neutral,” or “net zero,” document:

• The emissions you calculated

• The facilities and operations included

• The locations covered

• The time period measured

• Where the data came from

• The emission factors used

• Any estimates made

• Anything left out

• The emissions reduced

• Any renewable energy certificates used

• Any carbon credits purchased

• Whether a third party verified the results

A claim such as “carbon-neutral manufacturing” should apply only to the manufacturing operations covered by the evidence. It should not suggest that the entire company, supply chain, or product lifecycle is carbon neutral.

6. Evidence Supporting Carbon Offsets

A carbon-neutral claim should include purchased carbon credits, but you need to explain what was offset and how. Your supporting evidence should address:

• The emissions are being offset

• The quantity of credits retired

• The project or program generating the credits

• The applicable registry

• The credit vintage

• Additionality

• Permanence

• Leakage risk

• Verification

• Whether the same credit was counted elsewhere

Your marketing should also explain the role of offsets. Customers may interpret “carbon neutral” as meaning that the company produced no emissions. Instead, include in your claims language that you used verified carbon offset credits for the remaining balance. 

7. Real-World Recycling Availability

A product can be made from a recyclable material without being recyclable in practice. Collection systems may reject it because of:

• Size

• The mix of materials

• Coatings

• Adhesives

• Food contamination

• Local processing limitations

• Lack of commercial demand

• Sorting technology

FTC guidance requires that recyclable claims apply only when consumers have practical access to recycling facilities. A qualification may be necessary when appropriate recycling programs are unavailable in the majority of communities where the product is sold. Before describing a product or package as recyclable, collect evidence covering:

1. Material compatibility

2. Collection availability

3. Sorting capability

4. Processing capability

5. Geographic access

6. Any preparation required from the customer

“Check locally” does not automatically correct an otherwise misleading claim about recyclability.

8. Testing for Compostable and Biodegradable Claims

“Compostable” and “biodegradable” are not interchangeable terms. Compostable means a material breaks down into compost under specific conditions. Biodegradable means it can break down over time, but the term does not say how long that will take or where it will happen.

Some compostable products only break down in industrial facilities that control heat, moisture, and airflow. A biodegradable product may remain intact for years in a landfill, ocean, or outdoor environment.

Your evidence should show:

• The environment in which decomposition occurs

• The expected decomposition period

• Required temperature and moisture

• Whether industrial processing is required

• Relevant testing standards

• Residue or toxicity results

• Availability of suitable facilities

Your marketing should clearly state when a product is only commercially compostable. A package labeled simply “compostable” may give customers the impression that they can place it in a home compost pile. When that is not true, the qualification needs to be clear and prominent.

9. Material Composition Records

When it comes to recycled-content and renewable-material claims, you also need accurate records of what the product contains. Supporting evidence may include:

• Audit records

• Bills of materials (BOM)

• Chain-of-custody documents

• Manufacturing specifications

• Mass-balance calculations

• Purchase records

• Supplier statements

• Third-party certifications

Further, you will need to state whether the percentage applies clearly:

• one product component;

• the complete product;

• the primary material;

• the package; or

• the product and package combined.

The FTC advises marketers to qualify renewable-material claims unless the item is made entirely from renewable materials, excluding minor and incidental components. Marketers should also identify the renewable material and explain why it qualifies. 

10. Credible Third-Party Certifications

Certifications can support an environmental claim, but the logo alone is not proof. The EPA explains that ecolabels show that a product meets a specific set of environmental standards. Those standards may come from a government agency, nonprofit organization, or private company.

Before using any certifications in your marketing, find out who issued it, what the standards cover, and how compliance is checked. Then, look at how materials are tracked, whether the standards are public, and which claims the certification does not support.

Your marketing should not suggest that a certification covers the complete environmental performance of a product when it addresses only one attribute. A forestry certification, for example, may support a responsible-sourcing claim. It does not automatically prove that the finished product has a lower carbon footprint.

How To Build An Environmental Claims Evidence File

Every significant environmental marketing claim should have an internal evidence file ready for regulatory review. Collect: 

1. Keep a record of the exact claim, what it is meant to communicate, and where it applies. Note which products, markets, and lifecycle stages are included.

2. Keep the reports, certifications, and calculations behind each claim. The file should also explain how the results were calculated, which assumptions were made, and what the review left out.

3. Put one person in charge of keeping the information up to date. Note where the claim is being used, who signed off on it, and when the supporting evidence needs another review.

With this organized system, your marketing claims will be regulatory compliant and avoid conflicting language across proposals, product materials, and investor communications.

Use Qualifications That Customers Can See

A qualification only works when customers can see it, read it, and understand how it changes the claim. Place important limits or conditions next to the environmental statement they explain, not in:

• A separate webpage

• Small-print footnotes

• A hard-to-find technical report

• An unlabeled QR code

• General terms and conditions

• An internal sustainability policy

Your main marketing claim should remain clear and concise, so buyers do not have to sift through several documents to understand what you mean. However, provide access to supporting data and technical details for the procurement teams, regulators, and customers who want to review the evidence.

Include Your Future Sustainability Goals

You can market future sustainability goals, but the wording must make it clear that the work is still underway. “Working toward net zero” is accurate when your company has not reached net zero, but “net zero” is not. A strong future claim tells the buyer what you plan to achieve, when you expect to achieve it, and how much progress you have made. For example:

"We’ve already cut operational emissions 18% since 2022, and we’re aiming for 50% by 2030."

Using this claim gives the buyer a target, baseline, and current result. It also shows a real commitment to sustainability without presenting a future goal as a finished achievement.

Consider The Full Picture Of Your Message

Regulatory bodies like the FTC review the validity of your copy, but they also consider your images, graphics, and supporting information as part of your marketing claim. For example, if a small claim is surrounded by claims that can make the product seem more sustainable than the evidence shows. Make sure to review the bigger picture, not just your environmental claims copy.

Build Marketing From The Evidence Out

The strongest sustainability marketing process begins with evidence rather than a campaign concept. We recommend using a structured approach:

1. Identify the verified environmental improvement.

2. Define the scope and limitations of that impact.

3. Explain the methodology you used to identify and measure that impact.

4. Define why the impact matters to the buyer.

5. Add qualifications wherever necessary.

6. Confirm that the visuals match the claim.

7. Obtain technical and compliance approval.

8. Publish links to supporting information.

9. Review the claim when data or operations change.

A structured approach gives your sustainability marketing greater commercial value by providing stakeholders with more information. Specific environmental claims help procurement teams compare products. They give sales representatives credible proof points. They provide technical buyers with the information needed for internal approval. A structured approach also helps your company distinguish measurable progress from broad green positioning.

Evidence Is An Essential Part Of Your Market Position

Environmental claims substantiation should help you define your:

• Brand positioning

• Product messaging

• Sales enablement

• Sustainability reports

• Investor presentations

• Trade show content

Your evidence determines which claims you can lead with, which claims require context, and which claims should not be published yet.

Green Growth Assembly helps sustainability-focused companies turn technical data, operational improvements, and environmental performance into clear, credible marketing. We support market research, sustainability messaging, sales enablement, international market entry, and content development for manufacturers, energy providers, packaging companies, construction organizations, and green technology businesses.

Connect with Green Growth Assembly to schedule a call. We help you develop sustainability marketing your customers can understand and your technical team can defend.