Why Language, Claims, and Context Matter in Sustainability Communications

Regulators, investors, customers, and civil society all expect organisations to ensure that sustainability communications are clear, accurate, and supported by credible evidence.

This is why truMRK focuses on three core elements when reviewing sustainability communications: language, claims, and context. Together, these determine whether a message informs responsibly or risks misleading an audience.

Language: Clarity Over Ambiguity

The words used in sustainability communications shape how audiences interpret a message.

Terms such as “sustainable”, “eco-friendly”, “carbon neutral”, or “net zero” can easily be misunderstood if they are not defined or explained.

Regulatory guidance, including the CMA Green Claims Code and ASA/CAP guidance, emphasises that environmental statements must be clear, specific, and capable of being understood by a typical consumer.

At truMRK, we review language to ensure that:

• wording accurately reflects the underlying evidence

• qualifiers and limitations are clearly expressed

• broad or absolute terms are avoided where they cannot be substantiated

Careful use of language helps organisations communicate progress without creating unintended interpretations.

Claims: Evidence Must Support the Statement

A sustainability claim is any statement that suggests an environmental or social benefit, improvement, or reduced impact. Claims can appear in many forms: product descriptions, company reports, marketing campaigns, packaging, or website content.

For claims to be credible, they must be supported by relevant, verifiable evidence.

Our review assesses whether:

• the claim can be substantiated by the available evidence

• the scope of the claim matches what the evidence actually supports

• the level of certainty expressed in the language reflects the strength of the evidence

To ensure best practice has been followed, we also look to establish whether the evidence has been verified by a reputable third-party.

Context: What the Audience Needs to Understand

Even when language is accurate and evidence exists, claims can still mislead if they are presented without appropriate context.

Context helps audiences understand:

• what the claim covers (scope and boundaries)

• how the outcome was achieved (methods, assumptions, or standards)

• what limitations or trade-offs exist

For example, a reduction in emissions may apply to a specific product line, region, or time frame rather than the organisation as a whole.

Without that context, audiences may reasonably draw broader conclusions than intended.

Providing sufficient context allows stakeholders to interpret claims fairly and make informed decisions without omissions.

Supporting Responsible Communication

Language, claims, and context are closely connected.

When these elements align with the evidence behind them, sustainability communications become more transparent, credible, and resilient to scrutiny.

truMRK’s role is to independently review draft sustainability communications, assess the supporting evidence, and evaluate the clarity and risk of the language used. Where appropriate, we publish a Transparency Report that publicly documents what was reviewed and how claims were assessed.

The aim is simple: to help organisations publish sustainability information with confidence while enabling audiences to understand the claims being made.