(Smoking marijuana) can be harmful to health.Logical formLearned from2 sentences. Marijuana can be harmful to a brain.Logical formLearned from2 sentences. (Smoking systems) can be harmful.Logical formLearned from2 sentences. (Air pollutants) can be harmful to human health.Logical formLearned from2 sentences. Stresses can be harmful.Logical formLearned from2 sentences. Arthropods can be harmful.Logical formLearned from2 sentences. Cases can be harmful.Logical formLearned from2 sentences. A (monopoly power) can be harmful.Logical formLearned from2 sentences. A crap can be harmful.Logical formLearned from2 sentences. Ways can be harmful to girls.Logical formLearned from2 sentences. An infiltration can be harmful.Logical formLearned from2 sentences. (Drug errors) can be harmful.Logical formLearned from2 sentences. Brown tide can be harmful to humans.Logical formLearned from2 sentences. Studies can be harmful.Logical formLearned from2 sentences. (Fishing subsidies) can be harmful.Logical formLearned from2 sentences.