Control may pertain-to emissions.Logical formLearned from8 sentences. (Emission reductions) may be required.Logical formLearned from8 sentences. (Emission reductions) can be needed.Logical formLearned from8 sentences. (Emission reductions) may occur.Logical formLearned from8 sentences. Emissions may undergo a regulation.Logical formLearned from8 sentences. Exposure can be to emissions.Logical formLearned from8 sentences. Emissions can be from a refinery.Logical formLearned from8 sentences. (Mercury emissions) may pertain-to a country.Logical formLearned from8 sentences. Emissions can be sounds.Logical formLearned from8 sentences. (Air emissions) can be from sources.Logical formLearned from8 sentences. Engines may have emissions.Logical formLearned from8 sentences. A link can be between (fossil fuel emissions).Logical formLearned from8 sentences. (Air pollution) may undergo an emission.Logical formLearned from8 sentences. Persons may reduce emissions of (greenhouse gases).Logical formLearned from8 sentences. An emission may be beamed.Logical formLearned from8 sentences.