China’s rapid shift to electric and other new-energy vehicles reduced urban air pollution enough to prevent an estimated 262,000 premature deaths, according to a new peer-reviewed study published in Nature Health.
The study’s researchers, published in May, compared actual pollution levels to a counterfactual scenario in which every vehicle on the road still ran on an internal combustion engine.
Reduction in PM
By 2023, the spread of new energy vehicles (NEVs) – a category that includes battery-electric, plug-in hybrid, and hydrogen vehicles – was linked to a 23.80% reduction in fine particulate matter (PM2.5), a drop of 8.97 micrograms per cubic meter. Carbon monoxide fell even further, down 30.67%.
Nitrogen dioxide, on the other hand, dropped by only 1.81 micrograms per cubic meter, and reductions in coarser particulate matter were also low. The authors point to a clear culprit: heavy-duty diesel trucks, which remain largely un-electrified and are a major source of NO2 and coarse particles.
Air-quality improvement
The researchers estimate that those air-quality improvements prevented roughly 262,000 non-accidental deaths and about 75,000 all-cause deaths.
The benefits were concentrated in China’s wealthier, more economically developed cities, where NEV adoption has been fastest. Less-developed regions saw smaller gains.
Long-term exposure to PM2.5 and other pollutants is tied to stroke, heart disease, lung cancer, and respiratory illness.
Other regions
According to the researchers, China needs to accelerate the electrification of heavy-duty diesel vehicles and expand new-energy vehicle deployment into lower-income regions.
The effect isn’t unique to China. A separate study published in January 2026 in The Lancet Planetary Health, led by a University of Southern California team, found that California’s adoption of zero-emission vehicles is measurably improving air quality.
The EU
China reached close to 55% electric-car sales share in 2025, while the EU was still far lower: ACEA says battery-electric cars were 19.7% of EU new-car registrations in January-April 2026, with plug-in hybrids at 9.6%.
That means Europe has less “already banked” air-quality benefit than China, but more upside still available.
Transport remains the EU’s largest source of NOx emissions. Europe also still had 182,000 PM2.5-attributable premature deaths in 2023, even after major progress since 2005.
