Communicating Impact: The Key to Credible Sustainability Stories

Impact has become one of the most overused and misunderstood words in sustainability communications. Everyone wants to show they’re making a difference. But here’s the catch: under pressure, many organisations end up saying more than they can prove or promising more than they can deliver.

This isn’t usually about dishonesty. It’s often because they struggle to discuss progress, limitations, and intent in a way that still sounds confident.

The Real Risk Isn’t Under-Claiming. It’s Overstating.

Most greenwashing issues don’t stem from outright lies. They arise from vague language that sounds impressive but means very little. Future-tense promises are often presented as current reality. Isolated actions are framed as system-level change.

For example:

Instead of:

“We’re making a positive impact across our value chain.”

Try:

“This year, we focused on improving data quality in three sourcing regions, which helped us understand where our biggest gaps still are.”

If your claim can’t survive a simple follow-up question—like “How?” or “Compared to what?”—it’s probably doing more harm than good.

Impact is a Story of Progress, Not Perfection

One of the biggest mindset shifts I encourage is this: impact doesn’t have to mean outcomes you’ve already solved. Credible impact communication focuses on what you’ve done, what you’ve learned, what’s changing as a result, and what still needs work.

That difference shows up clearly in language.

Instead of:

“Leading the transition to a more sustainable future.”

Try:

“We’re testing changes to how we set targets and sharing what’s working and what isn’t.”

Audiences today are far more comfortable with “not there yet” language than many teams realise. What they’re less tolerant of is certainty without evidence.

Say What’s Real, Not What Sounds Impressive

A simple test I often use is this: would this sentence still make sense if it were read aloud in a board meeting or by a regulator? If not, it probably needs tightening. This is where specificity does a lot of quiet work for you.

Instead of:

“Delivering meaningful environmental outcomes.”

Try:

“We reduced energy use at two sites, and we’re still working to address Scope 3 emissions.”

Clarity doesn’t weaken your story. It anchors it.

You Don’t Need Less Ambition. You Need Better Language

Many teams worry that being precise will make their work sound smaller. In reality, it makes it more credible. There’s a big difference between claiming impact and showing how impact is being built.

Instead of:

“Driving system-wide change.”

Try:

“We’re contributing to a wider effort, but progress depends on partners, suppliers, and policy too.”

The second approach is slower, more careful, and far more defensible. Over time, it’s also what earns trust.

Building Trust Through Transparency

Transparency is essential in sustainability communications. When we share our journey, including the challenges we face, we build a stronger connection with our audience. They appreciate honesty and are more likely to support our efforts.

For instance, I remember a time when I worked with a small nonprofit. They were hesitant to share their setbacks. But once they did, their supporters rallied around them. They felt more connected to the mission and were eager to help.

This experience taught me that vulnerability can be a powerful tool. It shows that we’re all in this together, striving for a better future.

The Importance of Consistency

Consistency in messaging is crucial. It reinforces our commitment to sustainability. When we communicate our impact clearly and consistently, we build trust over time. This trust is invaluable, especially in a world where skepticism is common.

I often advise organisations to create a communication plan. This plan should outline how they will share their sustainability efforts regularly. Whether through social media, newsletters, or community events, consistency keeps the conversation alive.

Final Thought

Good sustainability communication doesn’t come from saying less. It comes from saying what’s true, in language that can stand up to scrutiny. Clarity beats confidence. Progress beats perfection.

If talking about impact feels risky, you’re not alone. At My Green Comms, I share practical examples and tools to help you stress-test your sustainability language before it goes live.

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By embracing these principles, we can all become better storytellers. Let’s share our sustainability journeys authentically, making a real impact together.