Hi all,
I also don't agree the article contents 100%, but I would like to comment some.

http://www.eia.doe.gov/cneaf/electri...t/co2emiss.pdf
On the Table 1 of above material, it says coal power plant emits approx 2.1 pounds CO2/kWh (935g/kWh).
On the Table 3, it says some divisions, such as East North Central and West North Central, generate more than 70% from coal.
We know the base electricity is generated by nuclear, then the other electricity is generated on-demand by mainly the fossil fuels. Therefore, if number of plug-in/electric cars were increased, the fossil fuels usage will be increased.

http://www.eaa-phev.org/wiki/Prius_PHEV
A plug-in Prius requires 260 Wh/mile (162 Wh/km) from grid electricity, which means a plug-in Prius emits 151 g-CO2/km using coal generated grid.

http://www.hybridsynergydrive.com/en...emissions.html
The UK gas/electric hybrid Prius is rated as 104 g-CO2/km.

Of course, a plug-in car does not use 100% coal generated grid, but I would like to tell the plug-in car does not mean totally clean.

Regards,
Ken@Japan