Pollutants can be harmful.Logical formLearned from423 sentences. A radiation can be harmful.Logical formLearned from419 sentences. Materials can be harmful.Logical formLearned from409 sentences. (Health effects) can be harmful.Logical formLearned from393 sentences. A content can be harmful.Logical formLearned from374 sentences. Products can be harmful.Logical formLearned from364 sentences. Toxins can be harmful.Logical formLearned from362 sentences. Organisms can be harmful.Logical formLearned from360 sentences. Ingredients can be harmful.Logical formLearned from321 sentences. Insects can be harmful.Logical formLearned from290 sentences. Drugs can be harmful.Logical formLearned from284 sentences. Impacts can be harmful.Logical formLearned from282 sentences. A substance can be harmful.Logical formLearned from267 sentences. Activities can be harmful.Logical formLearned from259 sentences. An (ultraviolet radiation) can be harmful.Logical formLearned from254 sentences.