A Guardian feature visits EcoDataCenter's wooden, renewable-powered datacentre in Falun, Sweden — which it says may be the world's greenest — where excess heat feeds the local district heating system and clients include DeepL, CoreWeave and Mistral. It argues Sweden's cold climate, green grid and locally integrated approach offer a contrast to US datacentre backlash, while noting problems such as Google illegally felling 250,000 trees in Finland and opposition even from a Swedish metal band.