Norwegian University study shows EV life-cycle emissions benefits vary significantly depending on electricity source
Thu 04 October 2012
View all news
The Norwegian University of Science and Technology (NTNU) has published a study comparing the emissions resulting from the production, in-use, and end-of-life phases of electric and internal combustion engine vehicles in a full life-cycle analysis. The study concludes that electric vehicles (EVs) coupled with low-carbon electricity sources can cut greenhouse gas emissions and exposure to tailpipe emissions from personal transportation but, depending on the method of power generation used, the benefits may be limited.
The scientists found that, judging by the likely global warming impact, switching to electric vehicles would be counterproductive in places where power is mainly produced from burning coal or heavy oil. Even when electricity is derived from relatively clean gas, the scientists write, “only limited benefits are achieved.”
In addition to taking account of power source, the study concludes that the environmental advantages of electric vehicles are diminished by the global warming impact of manufacturing them which, they say, is about twice the comparable impact of conventional vehicles. Cleaner power and long-lasting electric vehicles are key in addressing concerns of problem-shifting. The study states that “a more significant reduction in GWP [global warming potential] could possibly be achieved by increasing fuel efficiency or shifting from gasoline to diesel” in regular vehicles.
Related Links
< Back to news list