From the linked article:
"The rating include vehicles' performance against social standards set by the United Nations, including social performance, including respect for human rights, labor practices, environmental responsibility in manufacturing. Counting those factors alone, small, inexpensive cars scored big: the Mitsubishi Mirage (and Mirage G4), Nissan Versa, and Chevrolet Spark. These economic factors also weigh more heavily early in a car's life,"
I really like that they considered social impact (human rights and labor practices) in the manufacturing and life of the cars. Child labor issues in raw material source countries will be a problem for EVs. But labor problems exist for oil production in many parts of the world. A study that factors these in is long overdue and I appreciate them giving these aspects some weight.
I can't seem to find in the links the charts that show how each vehicle placed in their study. Did I miss that? Or is that privileged info and we plebians only get the press release that praises the Prime and a few others they decided to profile? I did see where the Prius C placed 17th, which qualified as the best scoring traditional hybrid. But I'd really like to see where the different models stand in relation to each other.