ZAN: from surface to functionality

The Climate and Resilience Law sets a clear course: to halve the consumption of natural, agricultural and forest areas (ENAF) by 2031, and to achieve zero net land take (ZAN) by 2050. The principle seems simple. The reality is more demanding.

Because de-paving isn't just about removing impermeable surfaces. Restoring soil, planting trees, or sowing a meadow isn't enough to recreate the ecological conditions that allow biodiversity to return, thrive, and flourish. Life isn't measured in square meters. It's measured in results.

Renaturation: how to define what actually works

The term "renaturation" is now widely used in planning documents. But behind the intention, the approaches remain highly variable:

• greening of roofs or the bases of buildings,
• plantings in open ground
• creation of specific habitats,
• restoration of ecological corridors.

These measures do not all have the same ecological impact. They do not all produce the same effects. The key question then becomes: how can we prove that the action taken actually benefits biodiversity?

Measuring biodiversity performance: a credibility issue

Within the framework of the ZAN (Zero Net Artificialization) objective, demonstrating the quality of restored surfaces becomes strategic. For project owners, this implies:

• moving beyond mere declarations
• avoid greenwashing tactics,
• secure their environmental communication.

This is precisely the role of independent assessment tools like the Effinature certification offered by IRICE. A structured, methodological approach that allows for:

• to measure the actual ecological contribution of a project,
• distinguish between surface effects and functional effects,
• to guarantee ecological continuity beyond visible developments.

What certification brings to zero-energy projects

The Effinature certification is part of this logic of objectification:

• qualification of biodiversity gains based on clear indicators,
• traceability of actions taken,
• independence of the evaluation.

It allows developers, promoters, land companies, and local authorities to demonstrate the sincerity of their efforts to de-artificialize land. It also helps avoid the pitfall of purely landscape-based rewilding, without any measurable ecological benefit.

Between gross and net artificialization: proof through living organisms

The ZAN (Zero Net Artificialization) objective calls for thinking in terms of flows, not just stocks. It's not simply a matter of offsetting hectares with hectares. It's about questioning the effectiveness of the systems, their capacity to sustainably support living organisms, and to recreate stable ecological interactions.

From this perspective, measuring biodiversity performance becomes a key lever. Not as an additional constraint, but as a guarantee of robustness and credibility.

To go further, IRICE offers an independent biodiversity performance certification, which can be integrated into de-artificialization and renaturalization projects within the framework of the ZAN objective. For any questions regarding the qualification of your initiatives, please contact us.