Ammonia may undergo (emission lines).Logical formLearned from2 sentences. An (ammonia gas) can be fresh.Logical formLearned from2 sentences. A subunit may pertain-to an (ammonia monooxygenase gene).Logical formLearned from2 sentences. Some levels can be constituted-of-or-filled-with (ammonia concentration).Logical formLearned from2 sentences. An effect of some levels of (ammonia concentration) may be studied.Logical formLearned from2 sentences. Interactions can be between (ammonia sources).Logical formLearned from2 sentences. An (ammonia volatilization) can be from (grazing livestock farms).Logical formLearned from2 sentences. (Ammonia emission) can be from a range of circumstances.Logical formLearned from2 sentences. An (ammonia content) can be aerial.Logical formLearned from2 sentences. Pollutants may be treated with ammonia.Logical formLearned from2 sentences. Information can be about ammonia.Logical formLearned from2 sentences. Exposure can be to levels of ammonia.Logical formLearned from2 sentences. Ammonia may cause burns.Logical formLearned from2 sentences. Exposure to ammonia may cause irritation of a respiratory tract.Logical formLearned from2 sentences. Ammonia may be manufactured by reacting hydrogen.Logical formLearned from2 sentences.