For a long time, "sustainable" was a marketing word as much as anything else. Companies could apply it fairly liberally with little to back it up. The EU Taxonomy was built to end that ambiguity: it's a classification system that spells out, in legal terms, which economic activities actually qualify as environmentally sustainable. The underlying goal is straightforward: stop greenwashing and steer capital toward activities that genuinely earn the label.

The Six Objectives

An activity counts as taxonomy-aligned if it makes a substantial contribution to at least one of six environmental objectives, without seriously undermining any of the others:

1. Climate change mitigation
2. Climate change adaptation
3. Sustainable use of water and marine resources
4. Transition to a circular economy
5. Pollution prevention and control
6. Protection and restoration of biodiversity

Three Conditions, All Required

Meeting one objective isn't enough on its own. An activity has to satisfy all three of the following:

• Substantial contribution to at least one of the six objectives above
• Do no significant harm (DNSH) to the other five
• Minimum safeguards: alignment with OECD guidelines and the UN Guiding Principles on Business and Human Rights

That third condition trips a surprising number of companies up. It's entirely possible to nail the environmental criteria and still fail alignment because of a governance or human rights gap elsewhere in the value chain.

What CSRD Asks Companies to Report

Under CSRD, companies disclose three taxonomy-related KPIs: what proportion of turnover, CapEx, and OpEx is taxonomy-aligned. Getting there requires mapping individual economic activities against the taxonomy framework in real detail: not a quick estimate but a genuine activity-by-activity assessment.

At BUME, we help companies do exactly that mapping, then calculate aligned turnover, CapEx, and OpEx for the CSRD report, turning what's usually a spreadsheet nightmare into something closer to a repeatable process.