Microsoft and other US tech firms successfully lobbied the European Commission in 2024 to adopt confidentiality rules that keep individual datacentre emissions data secret, with the final text matching industry demands almost word-for-word. The secrecy clause blocks public access to environmental metrics and prevents freedom of information requests, which legal scholars warn may violate EU transparency law and the Aarhus convention on environmental information access. The EU is tripling datacentre capacity by 2031 to compete in AI, but researchers now have only national-level summaries while individual facility pollution goes hidden. This reflects a broader pattern: major tech firms have gone quiet on climate commitments as AI demands for power-hungry datacentres conflict with net-zero goals.