29/04/2025
STUDY SHOWS GLOBAL EV ADOPTION FAILS TO CUT CO₂
There's little point in buying an electric vehicle if you're charging it with electricity generated by fossil fuels. In fact, when it comes to carbon dioxide emissions, your EV may be doing more harm than good.
This is according to a study by researchers from the University of Auckland and Xiamen University in China, published in the journal Energy.
The researchers analysed the environmental impacts of human activity and used a robust statistical approach to investigate what drives a nation's carbon dioxide (CO₂) emissions.
Using data from 26 countries over 15 years, they found a surprising trend: higher EV uptake was linked to increased CO₂ emissions. The reason? In a number of countries, EVs are still being powered by electricity generated through burning fossil fuels like coal or oil.
Associate Professor Stephen Poletti and Simon Tao, a doctoral candidate at the Business School's Energy Centre, didn't observe a significant reduction in CO₂ emissions globally due to EV adoption.
“On the contrary, EV adoption is positively associated with CO₂ emissions,” says Tao. “This finding appears counterintuitive; it challenges the conventional belief that EVs contribute to decarbonisation.
“Our analysis highlights that the environmental benefits of EVs are contingent on the composition of a country's electricity generation mix.”
Take EVs charged using electricity from coal-fired power plants, says Poletti.
“In that case, they may indirectly contribute to higher emissions than modern gasoline or diesel vehicles, especially considering the entire lifecycle from production to disposal.”
The study results suggest only when the global share of renewable electricity generation reaches approximately 48 percent will electric vehicle adoption contribute to reducing CO₂ emissions.