[Rumudiez]

It's great you're taking these "external" variables into account. To bandwagon on the environmental costs of car production, it would be cool to see motorcycles added to the lineup. A lot of motorcycles are lax on emissions control so it would be very interesting to see how they compare to hybrids and electrics.

[ymslavov]

We've actually considered adding it to the list, but as the information we found was either very scarce, unverifiable or unofficial, so we had to make the choice to leave it out for the time being. It's on our task list though, that's for the good idea!