In the period from December 2023 to November 2024, the United States has relied significantly on fossil fuels for electricity, with fossil-based sources like gas and coal making up just over half of the total consumption, at approximately 58%. Gas is the predominant fossil energy source, contributing close to 42%, while coal accounts for about 15%. On the other hand, low-carbon energy sources, which encompass nuclear, wind, solar, hydropower, and biofuels, together constitute a substantial portion, nearly 41%, of the country’s electricity. Nuclear energy plays a pivotal role in this clean energy segment with nearly 18%. Among the other low-carbon contributors, wind energy delivers just over 10%, solar energy provides around 6%, and hydropower contributes nearly 6%, while biofuels represent just about 1%.
To enhance low-carbon electricity generation, the United States can focus on expanding its existing capabilities in nuclear and wind energy, given their robust contribution to the current electricity mix. By drawing lessons from countries with successful low-carbon strategies, such as France or Slovakia, where nuclear power accounts for over half of electricity generation, the U.S. can aim to boost the role of nuclear power significantly. Similarly, the states can take a cue from Denmark, where wind energy contributes nearly 59% of electricity, showcasing the potential for increased integration of wind into the energy framework. These international examples provide valuable insights into the scalability of low-carbon technologies, aligning with global environmental goals.
Historically, the progression of low-carbon electricity in the U.S. has been characterized by notable shifts, particularly in the nuclear and hydropower sectors. In the late 1970s and throughout the 1980s, there was a commendable escalation in nuclear energy generation, witnessing increases like 62.3 TWh in 1975 and 75.5 TWh in 1988. This momentum continued into the 1990s, despite some fluctuations, such as a decline in 1997 by nearly 49 TWh, yet it managed a recovery soon after. The 21st century brought more variability, with significant hydropower dips in 2001, and more recently, a marked decline in nuclear power by 53.5 TWh in 2020, raising concerns about the reliability of clean energy strategies. Despite this, the rise in wind energy by 56.1 TWh in 2022 signifies a promise for cleaner electricity futures.