Amazon has seen its carbon emissions grow by 16 percent in 2025, driven predominantly by data center expansion.In its latest sustainability report, the company said that its emissions had grown to 80.85 million tons CO2 equivalent, the largest single-year increase since the company began tracking.In 2025, the company claims to have added more data center capacity globally than any other company, including more than 1.2GW in Q4 alone. As a result of the huge buildout, electricity-related emissions soared by 34 percent year on year, which the company said was due predominantly to its data center growth.While emissions soared, the company stated that its global fleet of data centers had an average power usage effectiveness (PUE) of 1.14, better than the industry average of 1.25 but behind Google's reported 1.09. Absolute energy consumption figures for AWS were not disclosed, with the report limited to efficiency metrics such as PUE and water usage effectiveness.In addition, the company said that said it matched 100 percent of its electricity consumption with renewable energy for the third consecutive year. However, as with most hyperscalers, the figure is based on annual global matching rather than hourly or location-matched procurement. In the report, the company acknowledged that 24/7 carbon-free energy remains an aspirational goal.Outside of its direct data center emissions profile, Amazon said its supply chain emissions rose by 20 percent and now account for 76 percent of the company's total footprint, driven largely by data center construction and hardware manufacturing on fossil-fuel-heavy grids in Asia-Pacific.The company also said that its carbon intensity increased 3 percent year-on-year, meaning that emissions from the group grew faster than revenue in 2025.Amazon's water usage effectiveness improved 20 percent year-on-year to 0.12 litres per kWh. The company said it is 75 percent of the way toward its goal of being water positive across all data centers by 2030, up from 53 percent in 2024. The company had previously reported that its data centers used 2.5 billion gallons of water in 2025, which was a fall compared to preceding years.Amazon admitted in the report that demand across its business “may slow” its progress toward its Climate Pledge commitment of net-zero carbon across operations by 2040.