(Technology breakthroughs) may save persons with (hydrogen cars).Logical formLearned from3 sentences. A (hydrogen plant) can be a (mass producer) of heavy water.Logical formLearned from3 sentences. (Hydrogen bonding) can be with (water molecules).Logical formLearned from3 sentences. Compounds can be with hydrogen.Logical formLearned from3 sentences. A (hydrogen sulfide) can be high.Logical formLearned from3 sentences. A company may unveil a hydrogen.Logical formLearned from3 sentences. (Hydrogen gas) may undergo a separation.Logical formLearned from3 sentences. Some methods can be for producing hydrogen.Logical formLearned from3 sentences. Some (hydrogen atoms) may be replaced by groups.Logical formLearned from3 sentences. Ions can be a hydrogen.Logical formLearned from3 sentences. A (hydrogen level) can be in a tank.Logical formLearned from3 sentences. Hydrogen may undergo a fermentation.Logical formLearned from3 sentences. Hydrogens can be attached.Logical formLearned from3 sentences. (Hydrogen storage densities) can be high.Logical formLearned from3 sentences. A (hydrogen atom) can be with an atom.Logical formLearned from3 sentences.