The comment about 15,000
The comment about 15,000 being a lot of miles for someone concerned about their carbon foot print misses the goal of the majority of the people. The goal is to reduce their footprint while maintaining their way of life. Maybe you use a mug in the office instead of the paper cups. Throw some solar on the roof to save money but use the same amount of electricity. It's like the obese person in the office walking over to the person that's been on a diet for 1 month, "I see you ate a donut this morning. Odd choice for someone on a diet" He then reaches over and grabs two donuts for himself. Sometimes we just want a donut. It seems to often happen that the person doing 0% talks down to the person doing 25%. As an aside, many people buy an electric car for reasons other than environmental.