“ I must say that it was sometimes somewhat embarrassing for me to return to EPA and ask for my colleagues to explain yet again that CO2 is a molecule and there is no scientific way of differentiating between CO2 from a car or a power plant. ”
Former EPA official Jason Burnett in Senate testimony, via Think Progress: Bush Cronies Tried To Redefine ‘Carbon Dioxide’ To Save Power Plants From Emissions Regulations which includes the video.