The Prius is a better option from a lifecycle CO2 perspective in many places than either a high efficiency conventional vehicle or a pure battery-electric vehicle. That changes if your electricity comes from more renewable sources -- California, for example. Shorter commutes favor small battery packs or no batteries at all.
https://iopscience.iop.org/article/10.1088/1748-9326/11/4/04...
The Prius is a better option from a lifecycle CO2 perspective in many places than either a high efficiency conventional vehicle or a pure battery-electric vehicle. That changes if your electricity comes from more renewable sources -- California, for example. Shorter commutes favor small battery packs or no batteries at all.