Researchers from esteemed institutions, including Duke University in the United States, have published a study in the journal 'PLOS Climate'. Their findings reveal that within two years of being put into use, the cumulative carbon dioxide emissions of lithium-ion battery electric vehicles (BEVs) dip below those of traditional internal combustion engine vehicles (ICEs).

The study harnessed the power of the Global Change Analysis Model (GCAM) to conduct a systematic evaluation of the full lifecycle emissions. This encompassed the emissions during various stages, such as fuel production, battery manufacturing, vehicle assembly, and operation.

Data indicates that in the initial two years of operation, electric vehicles emit 30% more carbon dioxide than their fuel-powered counterparts. This is primarily attributed to the high energy consumption inherent in lithium mining and battery manufacturing processes. However, a turning point occurs in the third year. As the operational mileage of electric vehicles climbs, their cumulative emissions start to fall below those of fuel-powered vehicles.

The study also makes some forward-looking predictions. It anticipates that by 2030, the production of each 1kWh lithium-ion battery will result in a reduction of carbon dioxide emissions by 220 kilograms. This figure is projected to further decline to 127 kilograms by 2050.

From an economic perspective, when assessing the environmental damage in monetary terms, the full-lifecycle environmental cost of internal combustion engine vehicles is found to be 2 to 3.5 times higher than that of electric vehicles.

The research team underscores that as the power structure gradually shifts towards clean energy sources, the emission reduction advantages of electric vehicles are poised to expand even further.