A metallic hydrogen can be solid.Logical formLearned from6 sentences. A (hydrogen bomb) may explode.Logical formLearned from6 sentences. (Fuel cells) may be powered by hydrogen.Logical formLearned from6 sentences. A hydrogen may be distributed.Logical formLearned from6 sentences. A (hydrogen production capability) can be large-scale.Logical formLearned from6 sentences. A use of hydrogen may reduce dependence.Logical formLearned from6 sentences. Persons may convert water to hydrogen.Logical formLearned from6 sentences. A use of hydrogen may provide heat.Logical formLearned from6 sentences. A (hydrogen initiative) may be aimed at demonstratting production of hydrogen.Logical formLearned from6 sentences. (Hydrogen programs) may pertain-to persons.Logical formLearned from6 sentences. Genes may produce hydrogen.Logical formLearned from6 sentences. A goal may pertain-to a (hydrogen initiative).Logical formLearned from6 sentences. Transportation can be by hydrogen.Logical formLearned from6 sentences. A use may pertain-to hydrogen.Logical formLearned from6 sentences. An emission can be from (hydrogen gas).Logical formLearned from6 sentences.