It's only 50% lower because most electricity grids emit a lot of carbon. Once the grid switches to 100% carbon-free, the number becomes a lot lower. And most of the embodied carbon in the car comes from industrial electricity or transport, so as the grid & transport goes green the embodied carbon goes down, eventually to zero.
Electricity only accounts for about 25% of greenhouse gas emissions, but it also enables industry (20%) and transportation (15%) to decarbonize too, by allowing them to replace their fuel with electricity.
A 50% reduction is already massive, but electrification of both vehicles and the industrial processes creating the vehicle will eventually let that number go to zero which should be our goal.
Electricity only accounts for about 25% of greenhouse gas emissions, but it also enables industry (20%) and transportation (15%) to decarbonize too, by allowing them to replace their fuel with electricity.
A 50% reduction is already massive, but electrification of both vehicles and the industrial processes creating the vehicle will eventually let that number go to zero which should be our goal.