A cause can be toxic.Logical formLearned from7 sentences. Precursors can be toxic.Logical formLearned from7 sentences. A (polyvinyl chloride) can be toxic.Logical formLearned from7 sentences. Toxic effects can be on humans.Logical formLearned from7 sentences. A toxic effect can be on a liver.Logical formLearned from7 sentences. A trend can be toxic.Logical formLearned from7 sentences. Chemicals can be toxic to humans.Logical formLearned from7 sentences. Samples can be toxic.Logical formLearned from7 sentences. Toxic wastes may undergo a production.Logical formLearned from7 sentences. Organochlorines can be toxic.Logical formLearned from7 sentences. Toxic effects can be apparent.Logical formLearned from7 sentences. Agency can be for toxic substances.Logical formLearned from7 sentences. Persons may be exposed to toxic substances.Logical formLearned from7 sentences. (Metal contaminants) can be toxic.Logical formLearned from7 sentences. A (mold problem) can be toxic.Logical formLearned from7 sentences.