Here is a very well written blog post on alternative fueled cars as not being a solution to climate change, and other things we care about:
“…instead of pursuing unproven technologies in a desperate last-ditch attempt to hang on to the way of life we’ve been living for the last 50 or so years, why don’t we look ahead and try to build a better world.”
I got this link from StreetsBlog, which if you don’t already follow it, is a great resource for transportation alternatives since it collects some of the best blog posts from Internet.