A litter can be harmful.Logical formLearned from4 sentences. Alcohols can be harmful.Logical formLearned from4 sentences. A trend can be harmful.Logical formLearned from4 sentences. (Lead levels) can be harmful.Logical formLearned from4 sentences. (Alpha radiation) can be harmful.Logical formLearned from4 sentences. A signal can be harmful.Logical formLearned from4 sentences. A fruit can be harmful.Logical formLearned from4 sentences. Marijuana can be harmful to lungs.Logical formLearned from4 sentences. A biological substance can be harmful.Logical formLearned from4 sentences. (Chemical components) can be harmful.Logical formLearned from4 sentences. Efforts can be harmful.Logical formLearned from4 sentences. Falls can be harmful.Logical formLearned from4 sentences. A body can be harmful.Logical formLearned from4 sentences. Mutations can be harmful.Logical formLearned from4 sentences. Policies can be harmful.Logical formLearned from4 sentences.