From pv magazine USA
The United States could nearly eliminate its carbon emissions and air pollution by 2148 if it maintained a pace of adding 43 GW of renewables per year, set during the first seven months of 2025, and achieved “near-electrification” of each energy-using sector.
Stanford University Prof. Mark Jacobson presented that finding and results for 149 other countries in a research paper that was recently published in RSC Sustainability.
The “most substantial and encouraging finding,” Jacobson said, is the “rate by which China is transitioning its energy economy.”
China, which added renewable generating capacity at an annual pace of 397 GW during the first 10 months of 2025, could at that pace eliminate carbon emissions and air pollution by 2051 with near-electrification of all energy sectors.
Whether China will electrify transportation, buildings and industry by 2051 is “an uncertainty” but “some recent data appear encouraging,” the paper said. It noted that more than half of the vehicles sold in China in 2024 were battery-electric vehicles. It also said that China is “already the world’s largest market” for electric heat pumps and “has the manufacturing base to ramp that up.”
Given that the United States and China have comparable land sizes and the US economy is larger than China’s, the paper said that China’s progress “suggests that the main barriers” to America achieving a renewables buildout as large as China’s “are social and political, not technical or economic.”
China is installing renewable generation at a rate “almost two orders of magnitude the rate it is installing new nuclear,” and “is also not distracted much by carbon capture, direct air capture, blue hydrogen, biofuels, or biomass.”
Canada, although it is already producing 16% of the renewably-generated electricity it needs to reach 100% renewables across all energy sectors, would reach a 100% standard “beyond the year 2350,” based on the “slow rate” at which it has recently increased renewable generation.
A “potential benefit” of the study, the paper said, is to provide countries with “a realistic sense of their progress” so they may then determine “if faster progress is necessary.”
The examples set by China and several other countries of the 150 countries analyzed “suggest that the world as a whole can succeed in a rapid transition if all countries make a strong social and political commitment to a transition and focus, like a laser, on clean, renewable energy.”
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