US Data Centers Threaten 15 Years of Climate Progress, Report Warns

Environmental Impact of Data Centers

Concerns have been mounting everywhere about the environmental impact of data centers, with alarms ringing at various environmental think tanks. The Sierra Club has put forth an estimate that by 2030, U.S. data center buildouts will be outputting as much carbon dioxide as the entirety of Mexico, pushing back progress on greenhouse gas reduction by 15 years.

The organization's principal advisor for climate and energy notes that the output from the U.S. power sector is set to put 2.1 billion metric tons of CO2 in the atmosphere by the end of the decade, representing an uptick of 42% compared to 2025 figures. Researchers' previous estimates were between a quarter and half of current projections.

Green Energy Mandates and Infrastructure Realities

An increasing number of countries and states are enacting laws demanding that new data center builds have a large portion of their power generated by green sources. However, those laws rarely apply retroactively, and oftentimes feature long phase-in periods. For instance, Irish legislation requiring new data centers to be fed by 80% renewable power only mandates compliance six years after they become operational.

In the current AI-driven market, speed of construction is prioritized. Roughly 40% of U.S. data centers are fed by natural gas turbines, and the situation is unlikely to change rapidly. The addition of green sources is struggling to keep pace with demand, while turbine prices have risen by 50% amid multi-year production backlogs.

Uncertain Future and Roadblocks

Analysts point out that although the current path presents environmental challenges, exact predictions remain difficult due to common industry roadblocks, including equipment availability and delays in grid connections.

Requests for permits currently exceed available grid capacity across the U.S., and numerous buildouts face strong local opposition. Additionally, questions regarding the long-term economics of hyperscalers introduce further uncertainty into future project completions.