DDT has been proven to be extremely harmful to the environment.
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Lilies, in particular, can be especially harmful for cats, and other blooms may cause stomach upset in dogs.—Taneia Surles, USA Today, 9 May 2026 Harm Wildlife If used in a garden, mothballs can expose helpful insects, mammals, pets, and people to harmful chemicals.—Samantha Johnson, Martha Stewart, 9 May 2026 One is that the AI may encourage thoughts or behaviors that are harmful to the individual or society, according to Guingrich.—Madeline Holcombe, CNN Money, 9 May 2026 Some studies have shown the mussels may be eating plankton that native fish and other species eat, and they have been linked to harmful algae blooms.—Paul Rogers, Mercury News, 8 May 2026 See All Example Sentences for harmful