This document discusses hydrogen fuel cell vehicles and CEM's related research and development efforts. It aims to reduce emissions and dependence on foreign oil through hydrogen, which can be produced from various sources. Current challenges include hydrogen production, distribution, storage and fuel cell costs. CEM addresses these challenges through technology demonstrations, commercialization partnerships, and education. Examples provided include a plug-in hybrid fuel cell bus demonstration, extended range hydrogen utility vehicles for the DLA, and an upcoming electric transit bus with on-route charging. The goal is to balance performance and costs to increase commercial acceptance of these technologies.