(High-purity hydrogen) may undergo a production.Logical formLearned from3 sentences. Support of a (hydrogen fuel initiative) can be approaches.Logical formLearned from3 sentences. A (funding request) can be for a (hydrogen fuel).Logical formLearned from3 sentences. Difficulties may be associated with development of a (hydrogen fuel cell vehicle).Logical formLearned from3 sentences. A (hydrogen fuel cell vehicle) may undergo a development.Logical formLearned from3 sentences. Research may be focussed on hydrogen.Logical formLearned from3 sentences. A (hydrogen initiative) may build on research.Logical formLearned from3 sentences. A technology can be for production of quantities of hydrogen.Logical formLearned from3 sentences. (Hydrogen production) may use fossil fuels.Logical formLearned from3 sentences. (Hydrogen programs) can be a kind of effort.Logical formLearned from3 sentences. Hydrogen may hold a promise of an (energy option).Logical formLearned from3 sentences. Materials may make (hydrogen storage).Logical formLearned from3 sentences. Programs may include hydrogen.Logical formLearned from3 sentences. A path can be toward a (hydrogen economy).Logical formLearned from3 sentences. An effort may be aimed at getting (hydrogen fuel cell).Logical formLearned from3 sentences.