He was on The Hour with George Stroumboulopoulos last night,
http://www.cbc.ca/thehour/content/wholeshow.html
I don't know if the individual video will be posted, and that link won't work after today. Anyway, he talked about his time at BMW, the Volt, GM, and global warming. Its the first interview and starts about 1/4 of the way through (no time index).