Datacentres drive up carbon emissions of Microsoft, Amazon and Google to a third of those of France

Inside a Microsoft datacentre. The company’s carbon emissions rose by 25 % over the past year to 20m TCO₂e. Photograph: Audrey Richardson/Reuters View image in fullscreen Inside a Microsoft datacentre. The company’s carbon emissions rose by 25 % over the past year to 20m TCO₂e. Photograph: Audrey Richardson/Reuters Datacentres drive up big tech’s carbon emissions to a third of those of France Microsoft, Amazon and Google say they still aim to achieve net zero output despite construction boom Microsoft, Amazon and Google’s collective carbon emissions have increased by nearly a fifth in the past year, driven largely by datacentre construction. In the financial year ending March 2026, the three tech companies emitted 119m mTCO₂e (metric tonnes of carbon dioxide equivalent), or about a third of those of France. The previous year, they emitted roughly 101m mTCO₂e, roughly equivalent to the 2024 emissions of Czechia. The US companies’ climate ambitions have been hit in recent years by a boom in demand for cloud services, such as storing data or running servers over the internet, related to training and operating chatbots and other AI products. Cecilia Rikap, an economics professor at University College London, said: “Claims by Microsoft , Amazon and Google about their clouds being ecologically friendly and sustainable are a marketing strategy. Governments should remember these expanding carbon footprints when the very same companies offer addressing the ecological crisis with AI solutions. “And, as migration to their clouds expands, and companies store data and train and use AI models and all sorts of digital technologies, these other companies are outsourcing their own digital/AI carbon footprint to cloud giants. Basically, shifting to the cloud helps other corporations obscure their environmental footprint.” Microsoft, Google and Amazon were contacted for comment. These increases were documented in the companies’ annual sustainability reports, which they have released over the past weeks. In its report released on Thursday, Microsoft said its carbon emissions had increased by 25% over the past year to 20m mTCO₂e, “driven primarily by the expansion of our datacentre infrastructure”. Google said its emissions had increased 18% over the past year, “driven by increases in supply chain activities that supported the rapid expansion of our business”. The search company says its AI systems have come up with solutions that have already helped to reduce emissions elsewhere by 41m tonnes of CO 2 last year. Amazon reported a 16% increase in emissions overall, and a 20% increase in supply chain emissions, which included datacentre building and construction. In its report, it still framed this as “making progress” towards its goal of net zero emissions in 2040. skip past newsletter promotion after newsletter promotion Bank of England handed powers to regulate key tech firms including Amazon and Google Read more The bulk of these emissions come from a big, global p