The tech giants' carbon footprint is a growing concern, with Microsoft, Amazon, and Google's emissions increasing by nearly a fifth in the past year. This surge is largely attributed to the construction of datacentres, a critical component in the AI boom. The financial year ending March 2026 saw these companies emit 119m metric tonnes of carbon dioxide equivalent, a significant jump from the previous year's 101m metric tonnes. This increase is equivalent to the 2024 emissions of Czechia, highlighting the environmental impact of these tech giants' operations.
Cecilia Rikap, an economics professor at University College London, offers a critical perspective, questioning the sincerity of these companies' claims about their cloud services being ecologically friendly and sustainable. She suggests that these claims are more of a marketing strategy, especially when governments consider these companies' potential solutions to the ecological crisis. As cloud migration expands, companies are outsourcing their digital/AI carbon footprint to cloud giants, raising questions about the true environmental impact of AI adoption.
The AI boom is driving a massive push to build datacentres, with tech giants spending an estimated $765 billion this year on AI datacentre infrastructure. This is a stark reversal from their previous efforts to cut carbon emissions. Microsoft's emissions, for instance, appeared to have flatlined at 16m metric tonnes in 2023 and 2024, but have now increased by 25% to 20m metric tonnes. Google's emissions rose by 18%, and Amazon's by 16%, with supply chain emissions, including datacentre building and construction, playing a significant role.
The Uptime Institute estimates that big datacentre projects announced last year would consume 1.3% of the world's electricity usage, a near-doubling of current demand. This surge in power demand is particularly concerning, with US projects expected to account for the majority of this increase. The availability of carbon credits to offset emissions is also a concern, with Shaolei Ren suggesting a possible lack of credit supply in the carbon market to meet the technology companies' needs.
The future of datacentre construction is promising, with JLL predicting the construction of about 1,200 datacentres globally between now and 2030, driven overwhelmingly by AI demand. This boom raises important questions about the environmental sustainability of AI and the role of cloud computing in exacerbating carbon emissions. As the world grapples with the implications of this technological revolution, it is crucial to consider the long-term environmental consequences of these companies' actions.
