Framework explainer

EU Taxonomy DNSH climate adaptation — a plain-language explainer

2026-08-25 · Framework explainer · 3 sources

What the EU Taxonomy's 'Do No Significant Harm' test for climate change adaptation actually requires, which physical hazards it lists, and what counts as evidence — for banks, companies and their advisors.

What the EU Taxonomy is

The EU Taxonomy (Regulation (EU) 2020/852) is the European Union's classification system for environmentally sustainable economic activities. It exists so that 'sustainable' means the same thing across banks, companies and funds — a disclosure vocabulary, not an investment recommendation and not a green label for portfolios.

Six objectives, one rule: do no significant harm

An economic activity is 'taxonomy-aligned' when it contributes substantially to at least one of six environmental objectives — climate change mitigation; climate change adaptation; sustainable use of water and marine resources; circular economy; pollution prevention; and biodiversity — while doing no significant harm (DNSH) to the other five, and meeting minimum social safeguards. DNSH is the part that is most often misunderstood: it is not enough to be green somewhere; you must not be causing material harm elsewhere.

The DNSH climate adaptation test in practice

For climate change adaptation, the Climate Delegated Act (Commission Delegated Regulation (EU) 2021/2139, Appendix A) requires an assessment of the material physical climate risks to the activity. Appendix A classifies the hazards to consider as chronic (for example changing temperature, water stress, sea-level rise) and acute (for example heat waves, wildfires, storms, flooding). The assessment must cover the activity's expected lifetime, use state-of-the-art climate projections where relevant, and — where material risks exist — be followed by adaptation solutions that reduce them. A paper statement that 'no risk exists' without underlying evidence does not meet the spirit of the test.

Why banks and companies should care

Banks disclose their Green Asset Ratio under EBA Pillar 3 ESG rules: the share of their covered assets that is taxonomy-aligned. That ratio is only as good as the evidence behind each alignment claim — including the DNSH adaptation assessment for every financed activity. Companies reporting under CSRD/ESRS meet the same vocabulary from the other side. In both directions, the practical question is identical: what physical evidence exists for the hazards at the asset's actual location?

What counts as evidence — and where Talaix fits

The adaptation test is, at its core, a request for physical evidence: observed hazard exposure, documented historical events, and declared modelled indicators at the asset's coordinates — with sources, dates and limitations. This is exactly the layer Talaix produces with its Green Finance verification reports: a per-hazard checklist in the Appendix A vocabulary, with claim status, confidence and declared data gaps. Talaix supplies the evidence; it is not an ESMA-registered external reviewer and does not issue Second Party Opinions. Unavailable data is declared, never invented.

Sources

Related tools

Green Finance VerificationTalaix Academy — EU framework map module

Related glossary: eu_taxonomy dnsh acute_hazard chronic_hazard green_asset_ratio