(Soil organisms) can be harmful.Logical formLearned from3 sentences. An advertisement can be harmful to children.Logical formLearned from3 sentences. Dietary supplements can be harmful.Logical formLearned from3 sentences. A radioactive iodine can be harmful.Logical formLearned from3 sentences. Fumes can be harmful.Logical formLearned from3 sentences. (Fishing activities) can be harmful.Logical formLearned from3 sentences. Terrorism can be harmful.Logical formLearned from3 sentences. Content can be harmful to children.Logical formLearned from3 sentences. Cells can be harmful.Logical formLearned from3 sentences. A bacterium can be harmful to (zebra mussels).Logical formLearned from3 sentences. Strokes can be harmful.Logical formLearned from3 sentences. Cigar can be harmful.Logical formLearned from3 sentences. Harmful (algal blooms) can be in coastal waters.Logical formLearned from3 sentences. Restrictions can be harmful.Logical formLearned from3 sentences. A biotoxin can be harmful.Logical formLearned from3 sentences.