CO2 emissions, Tesla.
Research tip: If passenger road transport would become 80 percent more electric and fuelled by renewables, European CO2 emissions could decrease by 84% by 2050 compared to 2010. The calculations stem from a study commissioned by the EEA.
oeko.de (summary), oeko.de (study, pdf)
Video tip: Is the Tesla Model S P100D really faster then the Model S P90D Ludicrous? It is indeed though not much as this drag racing series clearly shows.