Specifically, there was a hit-job white paper (I think it was from a marketing firm, can't remember the title) published in the past 5-10 years arguing that Hum

Specifically, there was a hit-job white paper (I think it was from a marketing firm, can't remember the title) published in the past 5-10 years arguing that Hummers were more eco-friendly than a Prius. The paper was thoroughly debunked, but it got a lot of media traction initially. That sort of headline sticks in the back of someone's mind, particularly if they never follow up on it. EDIT: Right, it was called Dust to Dust. Here's a pretty simple rebuttal from Slate(2008): http://www.slate.com/articles/health_and_science/the_green_lantern/2008/03/tank_vs_hybrid.html http://www.slate.com/articles/health_and_science/the_green_l... And yeah, it was a "market research" firm. I feel confident saying I write with a closer attention to facts and accurate calculations on my personal blog than their "business" did in the report.