Now here is an interesting link: http://www.eia.doe.gov/cneaf/electricity/epa/figes1.html What the pie chart says is that in 2007 2.5+5.8+19.4(other renewables, hydro, nulear)=32.7% of our electrical energy came from sources which did not emit CO2. The rest of the generation did result in CO2 release. The situation is currently somewhat worse than the approx. 1/2 referred to in the subject article. This link: http://www.eia.doe.gov/cneaf/electricity/epa/epat1p1.html shows a somewhat deminished reliance on coal by electric utilities over the last 10 years being more than offset by the increasing use of coal by independent electricity producers. So, at the bottom line, more than 2/3 of the electricity used to charge the batteries of BEVs results in the emission of CO2. There are still lots of quantative issues to resolve, so don't jump on my case too hard please ;-) Lets stick to the numbers, their validity, their reliability, and their interpretation.