Threats may be posed by toxic substances.Logical formLearned from2 sentences. Nanomaterials can be toxic.Logical formLearned from2 sentences. Studies may document toxic effects.Logical formLearned from2 sentences. Toxic effects may undergo a production.Logical formLearned from2 sentences. Machinery may participate in a production of toxic effects.Logical formLearned from2 sentences. Persons can be susceptible to toxic effects of cocaine.Logical formLearned from2 sentences. Toxic effects can be from drugs.Logical formLearned from2 sentences. (Brain effects) can be toxic.Logical formLearned from2 sentences. Toxic effects can be constituted-of-or-filled-with (tobacco exposure).Logical formLearned from2 sentences. Research may provide evidence of toxic effects of prenatal exposure to (tobacco smoke).Logical formLearned from2 sentences. Exposure to doses of nicotine can be toxic.Logical formLearned from2 sentences. A toxic effect of exposure to inhalants can be damage to a brain.Logical formLearned from2 sentences. A (club drug ecstasy) can be toxic to axons.Logical formLearned from2 sentences. Toxic effects can be constituted-of-or-filled-with ecstasy.Logical formLearned from2 sentences. Toxic effects can be on a (serotonin system).Logical formLearned from2 sentences.