No surprise here for most EV drivers, but still good to see in black and white.

Electric cars charged on the grid generally have a lower carbon footprint than internal-combustion vehicles–and their wells-to-wheels carbon emissions only shrink as more renewable energy comes online.

That’s the conclusion of a new study on the environmental effects of future transportation electrification, jointly conducted by the Electric Power Research Institute (EPRI) and National Resources Defense Council (NRDC).

It follows and updates a landmark 2007 report by the pair that was among the first to analyze the long-term effects of electric cars, both on global carbon emissions and on electric-utility infrastructure.

A transition to more electric cars and greener grid-electricity sources, it confirms, could have a significant impact in reducing greenhouse gas emissions.

The study confirms what several previous analyses have said: As the grid gets cleaner, so do electric cars.

Read more: Green Car Reports