Plans can be for a (hydrogen highway).Logical formLearned from3 sentences. Hydrogen may be extracted.Logical formLearned from3 sentences. Hydrogen may exist as gas.Logical formLearned from3 sentences. Transition can be to a (hydrogen economy).Logical formLearned from3 sentences. A market can be for hydrogen.Logical formLearned from3 sentences. A tube can be constituted-of-or-filled-with (hydrogen gas).Logical formLearned from3 sentences. Hydrogen can be in a form.Logical formLearned from3 sentences. Electrons can be from hydrogen.Logical formLearned from3 sentences. Releases can be constituted-of-or-filled-with hydrogen.Logical formLearned from3 sentences. Membranes can be for (hydrogen purification).Logical formLearned from3 sentences. Hydrogen may provide energy.Logical formLearned from3 sentences. A (hydrogen gas) may be burnt.Logical formLearned from3 sentences. (Hydrogen production) can be from sources.Logical formLearned from3 sentences. A material can be for storring hydrogen.Logical formLearned from3 sentences. (Hydrogen generators) can be mobile.Logical formLearned from3 sentences.