Switching Earlier from a Gas Powered Vehicle to An Electric Vehicle Cuts Carbon Emissions by Over Half

Replacing gasoline vehicles with electric models can cut carbon emissions by up to 58 percent.

Researchers at UC Santa Barbara and UC Santa Cruz studied carbon emissions from gasoline and battery electric vehicles over varying replacement timelines, revealing that retiring gasoline cars early yields the greatest environmental benefits.

The study analyzed more than 400 vehicle models, accounting for manufacturing emissions, grid electricity sources, vehicle mileage, and battery size. Results showed that replacing a gasoline vehicle at year one with a battery electric vehicle reduces emissions by 58 percent over a 16-year lifespan. However, seldom-driven vehicles and regions with high grid CO2 emissions see less benefit. The study, published in Science, found 92 percent of modeled scenarios favor electric replacement for lowering emissions. Researchers also noted it takes about three years for an EV’s reduced operational emissions to offset its manufacturing footprint.

Going forward, the authors recommend expanding vehicle scrap-and-replace programs and focusing on behavioral factors to accelerate electric vehicle adoption.

Electric car emissions benefits are far greater than first thought
By Harrison Tasoff-UC Santa Barbara, Futurity