Sometimes executives can put their foot in their mouths, but calling global warming "a crock of s**t," goes beyond that. GM (NYSE: GM)'s Vice Chairman Bob Lutz recently expressed that opinion on his own (not reflective of GM), but it's still being hailed as idiotic on plenty of forums and blog posts from around the world this week.

Lutz had to fire off a blog post of his own to defend his words, but it doesn't matter. He said what he said, and to the ever-growing ecologically astute crowd that's running from GM's gas-hogging SUVs into Toyotas and Hondas, his comments only strengthen what many think of GM: a major contributor to global warming through its huge vehicles for all those Suburban soccer moms and masculine Hummer men.

Now, Lutz did repair his words as best he could in his defense, saying that: "General Motors is dedicated to the removal of cars and trucks from the environmental equation, period. And, believe it or don't: So am I! It's the right thing to do, for us, for you and, yes, for the planet. My goal is to take the automotive industry out of the debate entirely."

It's true that GM has made great strides in trying to revolve its product portfolio around more eco-friendly vehicles, but it still has a long way to go. If it can really make a concept like the Volt work on a mass scale, the recognition GM will receive will go a long way, regardless of lessening dependence on foreign oil or helping curb global warming. Customers will take notice.