Waste can be harmful to an environment.Logical formLearned from2 sentences. A hydrogen can be harmful to persons.Logical formLearned from2 sentences. A herbicide can be harmful to health.Logical formLearned from2 sentences. Supplements may leave harmful.Logical formLearned from2 sentences. Spirits can be harmful to health.Logical formLearned from2 sentences. Sulphuric acid can be harmful to a respiratory tract.Logical formLearned from2 sentences. A transmission of electric current can be harmful to public health.Logical formLearned from2 sentences. (Farm products) can be harmful.Logical formLearned from2 sentences. An element can be harmful to humans.Logical formLearned from2 sentences. (Textile dyes) can be harmful.Logical formLearned from2 sentences. Restrictions can be harmful to consumers.Logical formLearned from2 sentences. A situation can be harmful to an international community.Logical formLearned from2 sentences. Opium can be harmful.Logical formLearned from2 sentences. Possession of nuclear arms can be harmful to a country.Logical formLearned from2 sentences. Substances can be harmful to humans.Logical formLearned from2 sentences.