The latest paper from UCS on EVs and greenhouse gases is out! http://www.ucsusa.org/sites/default/files/attach/2015/11/Cleaner-Cars-from-Cradle-to-Grave-full-report.pdf From the summary: As a side note, the EPA thankfully changed their "egrid" naming conventions. So now, the year in the name is the year the data is from, rather than the year of release. The report above is using the latest, 2012, electric grid data. Three years out of date, but much better than 4 or 5 years out of date.