Climate goals go up in smoke as US datacenters turn to coal

Summary

US datacenters are experiencing a significant shift toward coal-powered energy due to elevated natural gas prices and rapidly growing electricity demand. According to a research note from financial services firm Jefferies, datacenter operators are racing to connect new capacity to the electrical grid, with accelerated load growth expected during the 2026-2028 period. This spike in demand is driving an unexpected resurgence in coal generation, which has increased nearly 20 percent year-to-date. The research note, seen by The Register, states: "We raise our estimate for coal generation by ~11 percent (driven by higher capacity factors), and staying elevated through 2027 on favorable fuel pricing vs gas (particularly for existing fleet).". Warnings emerged last year that rising energy demand from the proliferation of data centers in the US risked outstripping available generation capacity, potentially extending the operational life of coal-fired power plants. In Omaha, one power company reversed plans to stop burning coal to produce electricity, citing the need to serve nearby datacenters. The company determined that decommissioning coal-burning generators at the North Omaha power plant would risk power shortages in the district given rising energy requirements from these facilities. This reversal, as The Register reported at the time, carries environmental implications. Continued coal combustion affects local air quality near power plants and hinders broader efforts to reduce greenhouse gas emissions. Campaign group Greenpeace has characterized coal as "the dirtiest, most polluting way of producing energy." The environmental impact extends globally. A 2024 Morgan Stanley report projected that datacenters will emit 2.5 billion tonnes of greenhouse gases worldwide by 2030 — triple the emissions that would have occurred without the development of generative AI technology. Natural gas-powered turbine generators had been the favored choice to power the ongoing datacenter b...