With new major spending packages investing billions of dollars in electric vehicles in the U.S., some analysts have raised concerns over how green the electric vehicle industry actually is, focusing particularly on indirect emissions caused within the supply chains of the vehicle components and the fuels used to power electricity that charges the vehicles.

But a recent study from the Yale School of the Environment published in Nature Communications found that the total indirect emissions from electric vehicles pale in comparison to the indirect emissions from fossil fuel-powered vehicles. This is in addition to the direct emissions from combusting fossil fuels -- either at the tailpipe for conventional vehicles or at the power plant smokestack for electricity generation -- showing electric vehicles have a clear advantage emissions-wise over conventional vehicles.

"The surprising element was how much lower the emissions of electric vehicles were," says postdoctoral associate Stephanie Weber. "The supply chain for combustion vehicles is just so dirty that electric vehicles can't surpass them, even when you factor in indirect emissions."