Notes on claims, numbers and what startups can prove.

Short, sourced pieces on environmental claims, avoided emissions and the rules that now apply to them. One a week when we can.

Two shoppers reading the label on a product in a small grocery shop
1 October 2026 · 5 min read

The EU's green claims rules are now in force. Here's what changes for climate and circular startups.

Since 27 September, "sustainable", "eco-friendly" and "carbon neutral" are no longer words a brand can use on their own in the EU. What changed, who it reaches, what didn't change, and the five patterns we keep seeing on startup websites.

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Next: the number we didn't count, on deliberate zeros in avoided emissions.