Nana Banana
The United States experienced a significant and concerning reversal in its climate progress last year, with greenhouse gas emissions rising for the first time in three years. This increase, estimated at 2.4% by the Rhodium Group, a leading independent research firm, outpaced the nation’s economic growth and was primarily driven by a convergence of an exceptionally cold start to 2025 and the burgeoning, energy-intensive demands of data centres and cryptocurrency mining operations. This unexpected surge highlights the intricate challenges the U.S. faces in decarbonizing its economy, even as it strives to expand renewable energy capacity.
A particularly frigid winter in early 2025 across large swathes of the United States significantly impacted residential energy consumption. In the colder northern and midwestern regions, where natural gas and other fossil fuels remain the primary sources for heating, homes burned considerably more fuel to stay warm. The Rhodium Group’s analysis revealed that consumption of these heating fuels jumped by nearly 7% compared with the previous year. This direct consequence of extreme weather underscores the vulnerability of the energy system and emissions profile to climatic fluctuations, especially in a nation still heavily reliant on traditional energy sources for essential services like home heating.
Beyond the immediate impact of the cold, a more structural shift in energy demand is emerging from the rapid expansion of the digital economy. The boom in data centres, which power everything from cloud computing services and artificial intelligence applications to streaming platforms, and the highly energy-intensive process of cryptocurrency mining, particularly for Bitcoin, placed immense new strains on the national electricity grid. Regions like Texas and the Ohio Valley, which have attracted significant investment in these digital infrastructure projects due to favourable energy prices and infrastructure, experienced substantial increases in their power needs. These facilities operate around the clock, requiring vast amounts of electricity not only to run their servers and computational hardware but also to cool them, preventing overheating. The energy footprint of a single large data centre can rival that of a small town, making their proliferation a major factor in overall electricity demand.
This confluence of rising residential heating demand and the insatiable power requirements of the digital sector led to a significant spike in overall electricity generation needs. Compounding this challenge was the elevated cost of natural gas in the U.S., which made it less economically attractive for power plants to burn. Consequently, utilities turned to a more readily available and, at the time, cheaper alternative: coal. The data from Rhodium Group shows a striking 13% surge in U.S. coal use last year, a stark departure from the long-term trend of decline. This "fuel switching" phenomenon, where power generators opt for the most cost-effective fuel, illustrates how market dynamics can quickly undermine decarbonization efforts.
Michael Gaffney, the lead author of the Rhodium Group’s report, elaborated on this dynamic, stating, "The grid decided to meet that additional load this year, in part with renewables, in part with fossil but because of higher natural gas prices, there was some fuel switching that saw marginally more coal than there was in 2024." This highlights that while renewables did grow, they couldn’t entirely offset the increased demand, and economic factors pushed more carbon-intensive coal into the mix.
This U.S. coal resurgence stands in sharp contrast to global trends observed in major economies like India and China, traditionally heavy coal users. An analysis by Carbon Brief revealed that coal use for electricity generation in India dropped by 3% and in China by 1.6% last year. Both Asian giants achieved this reduction by adding record amounts of new wind and solar energy capacity, demonstrating a clearer trajectory towards decarbonization in their power sectors despite their massive energy needs. Their success underscores the U.S.’s challenge in rapidly scaling up renewables to meet burgeoning demand and displace fossil fuels.
The high price of natural gas in the U.S. is not merely a domestic market phenomenon; it’s intricately linked to the nation’s role as a major exporter of liquefied natural gas (LNG). Other observers, such as Jesse Lee from Climate Power, a prominent U.S.-based environmental advocacy group, point to the continued large-scale exports of natural gas to the rest of the world as a significant factor. "Higher natural gas prices means that finally, coal, which had been kind of driven to extinction by low natural gas prices, well [gas is] now so expensive that coal’s worthwhile again," Lee explained. "And that’s what is allowing coal to make this comeback." This perspective suggests that the U.S.’s strategy to become a global energy supplier might inadvertently undermine its domestic climate goals by creating market conditions favourable to coal.
The comeback of coal in 2025 is particularly notable given its precipitous decline over the past two decades. Since 2007, coal power generation in the U.S. had shrunk by a remarkable 64%, driven largely by the availability of cheap natural gas and increasing environmental regulations. Last year’s rise was only the second such increase in the last decade, sparking debate about whether it was an isolated incident or a sign of a more persistent trend. Furthermore, 2025 also saw a slowdown in the rate of coal plant retirements, with many electricity companies delaying planned closures to ensure sufficient capacity to meet the heightened demand.
So, is 2025 merely a blip, or the start of a more sustained revival of coal? Michael Gaffney’s assessment suggests the latter. "It’s more than just a blip," he affirmed. "This is a response to the demand growth in the sector, a lot of it is coming from data centres, cryptocurrency operations, other large load customers, and that demand growth is here to stay." This ominous outlook implies that without significant policy interventions and accelerated renewable energy deployment, coal could continue to play a larger role in the U.S. energy mix than previously anticipated.
Despite the overall increase in emissions, there were bright spots in the U.S. energy landscape. Solar power experienced a major growth spurt last year, rising by an impressive 34%—its fastest rate since 2017. This surge in solar deployment demonstrates the potential for rapid decarbonization when investment and policy support align, though clearly, it was not enough to offset the increases elsewhere.
Transport, encompassing road, rail, and air travel, remains the single largest source of warming gases in the U.S. The sector continued its upward trend, with road traffic volumes increasing for the fifth consecutive year. However, emissions from the transport sector were virtually flat in 2025, a testament to the growing adoption of more efficient vehicles. This stabilization was primarily attributed to an increasing number of hybrid and electric vehicles on the roads, which are significantly reducing fuel consumption per mile. Hybrids, in particular, showed strong growth, with sales up 25% compared to 2024, indicating a consumer shift towards more fuel-efficient options even amidst rising travel demand.
The political context surrounding these emission trends is also crucial. While President Trump has been vocal in his determination to roll back the climate-related policies of his predecessor and aggressively boost U.S. fossil fuel extraction, the Rhodium analysts who conducted this report concluded that these policy changes had little "meaningful impact" on the rise in emissions specifically in 2025. Their view is that the primary drivers were market forces and weather.
However, others disagree with this assessment. Jesse Lee of Climate Power argues for a more nuanced interpretation of the administration’s influence. "There is a data centre explosion, that is somewhat independent of Trump," Lee conceded, acknowledging the underlying technological and economic drivers. "You could argue maybe his policies haven’t all kicked in full blast yet, but I don’t think you can really divorce his natural gas exports and his blind support of AI and data centres from this dynamic that’s driving up emissions." Lee’s perspective suggests that while the direct impact of policy changes might not yet be fully reflected in the 2025 data, the broader rhetoric and support for fossil fuels and energy-intensive industries could be creating an environment that indirectly fuels higher emissions. The interplay between market forces, extreme weather, and political decisions creates a complex picture for the future of U.S. greenhouse gas emissions, underscoring the formidable challenge of achieving ambitious climate targets.
George Anjay
Ramos Leo
Nakalama John
