Klaverblad
CO2 reduced
Challenge
From promise to proof
Sustainers helps organisations turn small, practical actions into measurable CO2 and business impact. Step by step, change becomes part of how work is done.
Get in touch"Starting small and staying consistent — supported by the Sustainers app — helped us save 400,000 kg of CO₂, and genuinely changed my personal behavior for good."
Klaverblad Verzekeringen had just appointed its first ever sustainability manager. That person was Iris Mardi. She quickly set up a working group and got management on board. The will was there. The structure was taking shape.
But there was a gap between what the organisation said and what employees experienced. Sustainability was still too often something Klaverblad did on paper, not something people felt or contributed to themselves.
Iris wanted two things. Broader support across the organisation. And to make a demonstrable difference. Not to communicate about sustainability, but to show it. With people who start moving themselves and make an impact together.
The approach
In March 2024, Klaverblad launched an awareness and activation programme with Sustainers. Deliberately set up as a two-year long-term journey. Because real behaviour change does not happen in a week.
Through the app, employees took on practical challenges that connected directly to everyday life. Taking shorter showers, using the stairs, printing less, heating smarter, eating less meat. Every participant started with a personal baseline measurement, making the CO₂ savings per challenge immediately visible and personal.
17 active teams were formed. People who challenged, encouraged and motivated each other toward a shared goal.
What gave the programme extra momentum was the role of the top. The CEO and CFO of Klaverblad did not just participate. They made a personal video about it and openly shared what the programme had done to their own behaviour. Sustainability was not imposed from above. It was modelled from above.
What happened
The programme grew steadily. Employees invited colleagues themselves. Teams challenged each other. And the awareness that emerged went beyond the obvious themes. People discovered impact in places they had not expected. In their energy use at home, their travel behaviour and their daily food choices.
Working with themes and milestone cards helped keep the energy alive, even when the initial enthusiasm had passed. Sustaining two years takes structure. That structure was there.
The results
106 active users out of approximately 400 employees. More than one in four colleagues actively participated. Together they completed 1,254 challenges and logged 3,682 check-ins.
The top 3 themes delivering the most impact: home energy at 8,175 kg CO₂, transport at 4,378 kg CO₂ and food and drink at 2,242 kg CO₂.
And the total after two years: 539 tonnes of CO₂ saved.
The CFO put it best:
"Starting small and staying consistent, supported by the Sustainers app, helped us save 400,000 kg of CO₂, and genuinely changed my personal behavior for good."
The learning
Sustaining two years takes more than a good platform. It takes visible leadership, a clear structure and enough variety to keep people engaged. At Klaverblad the milestone cards and themes worked well as anchor points during moments when energy dipped.
The most important lesson: when leadership participates and shows it openly, it gives the rest of the organisation permission to truly get involved.
What this means
Klaverblad showed that sustainability is not a project. It is a culture. You do not build that in a quarter. But when you approach it well, with engaged leaders, daily small wins and a community that moves forward together, you build something that lasts.
539 tonnes less CO₂. And an organisation that has fundamentally changed the way it thinks.