KATHMANDU: China’s rapid shift to electric vehicles has significantly improved air quality and public health. A new peer-reviewed study published in Nature Health estimates that this transition prevented around 262,000 premature deaths.
The study analyzed air quality across 150 Chinese cities using satellite data and machine learning. It compared real-world conditions with a scenario where all vehicles still used internal combustion engines.
By 2023, the rise of new energy vehicles (NEVs), including battery electric, plug-in hybrid, and hydrogen models, reduced PM2.5 levels by 23.8%. This equals a drop of 8.97 micrograms per cubic meter. Carbon monoxide levels fell even more, by 30.67%.
Researchers estimate these improvements avoided about 262,000 non-accidental deaths and around 75,000 total deaths.
However, not all pollutants declined equally. Nitrogen dioxide levels dropped only slightly, by 1.81 micrograms per cubic meter. Heavier diesel trucks, which are still mostly non-electric, remain a major source of such emissions.
The benefits were also uneven. More developed cities saw greater improvements due to faster EV adoption. Less-developed regions recorded smaller gains.
The study suggests that further electrification of heavy-duty vehicles and wider EV adoption in lower-income areas are needed to expand the health benefits.
China has already crossed a major milestone, with EVs accounting for over 50% of new car sales. Strong government support and long-term investment have played a key role in this shift.
Similar trends are seen in the United States. A separate 2026 study found that increasing zero-emission vehicles in California has led to measurable reductions in nitrogen dioxide levels.
The findings highlight that EV adoption not only reduces emissions but also delivers real-world health benefits.
