Give me a break. Did you read the article?

Although touted as zero-emissions vehicles, most of the cars will run on hydrogen made from natural gas, a fossil fuel that contributes to global warming. Now scientists at Stanford University have developed a low-cost, emissions-free device that uses an ordinary AAA battery to produce hydrogen by water electrolysis.

You don't agree the juxtaposition gives the impression that the latter alternative won't contribute to global warming?

Edit: just to be clear, I'm not saying the research isn't useful. My issue is with the article.