How to Use harmful in a Sentence

harmful

adjective

• DDT has been proven to be extremely harmful to the environment.
• Most of the time, these changes are harmful to the virus or have no effect.
  — Brenda Goodman, CNN, 8 Feb. 2025
• In most of these cases, the aim is to capture and store the harmful greenhouse gas.
  — Mack Degeurin, Popular Science, 28 May 2025
• If their viewpoint is not harmful, do your best to live and let live.
  — Tarot Astrologers, Chicago Tribune, 14 Apr. 2023
• The jury is still out on whether emulsifiers are harmful to the gut.
  — Fran Kritz, Verywell Health, 30 May 2025
• That’s not right, and this lawsuit seeks to stop this harmful merger.
  — Alexander Coolidge, The Enquirer, 15 Jan. 2024
• That's not right, and this lawsuit seeks to stop this harmful merger.
  — Kate Gibson, CBS News, 15 Jan. 2024
• What’s wrong with the recent attention to the idea that AI can be harmful?
  — Jennifer Conrad, WIRED, 21 Dec. 2022
• The best choice is SPF 50, which protects your skin from exposure to 98% of the sun’s harmful rays.
  — Grooming Playbook, The Salt Lake Tribune, 10 Apr. 2022
• Study after study have shown the harmful effects of too much screen time.
  — Bill Ready, Time, 23 Apr. 2025
• Some of these supplements may even be harmful to your health.
  — Dallas News, 23 Dec. 2022
• That doesn’t mean the virus’s growth isn’t harmful, however.
  — Chloe Taylor, Fortune, 2 Mar. 2023
• But a new study shows that being denied one can be more harmful.
  — New York Times, 10 June 2022
• Researchers may have found that the tartaric acid in grapes and raisins is the substance which is harmful to dogs.
  — Justin Gest, Newsweek, 10 Feb. 2025
• Here's what to know about the chemical and its harmful health effects.
  — Grace Tucker, The Enquirer, 24 Sep. 2024
• The hope is the breakthrough will pave the way for other vaccines to control all sorts of harmful viruses and pests.
  — Ben Tracy, CBS News, 8 Mar. 2023
• Some microbes are helpful to the body, while others can be harmful.
  — Andrea Michelson, Verywell Health, 29 Aug. 2023
• Often, a small glass of milk or bowl of yogurt is enough to protect your belly from the harmful effects of the medicine.
  — Avery Hurt, Discover Magazine, 10 Jan. 2024
• This can expose the brain to chemicals and proteins that are harmful to it – compounds that are safe in the blood but toxic to the brain.
  — Rachael Seidler, Discover Magazine, 22 Sep. 2023
• Even apps like YouTube Kids can expose kids to harmful content.
  — Anna Halkidis, Parents, 19 May 2025
• The unique design and structure make this wire creation sturdy — and sometimes harmful to the touch.
  — Brittany Kasko, Fox News, 24 Nov. 2023
• The feature will ensure that your ears are not exposed to loud noises that can be harmful.
  — Chris Smith, BGR, 30 Sep. 2022
• For 23 of the bars, consuming just an ounce a day would put an adult over a level for at least one of the metals that could be harmful, CR said.
  — Kate Gibson, CBS News, 30 Dec. 2022
• The hat can be folded into your bag without losing its shape and the wide brim can protect you from the sun's harmful rays.
  — Kristin Braswell, Travel + Leisure, 25 Sep. 2024
• The court further found that the statements in question were harmful to Pettit's defense.
  — Stephanie Slifer, CBS News, 26 Oct. 2022
• Be sure to move any harmful cleaners and household chemicals out of the reach of children.
  — Leada Gore | [e-mail], al, 19 Dec. 2022
• Shiny and minty, these balms provide a gloss-like effect while protecting your lips from the sun’s harmful rays.
  — Jillian Dara, Travel + Leisure, 9 Apr. 2025
• There are many Amanita species, many of which are not harmful, but all the lethal ones are classified in the section Phalloideae.
  — Beth Mole, Ars Technica, 13 Oct. 2022
• Scientific studies have also shown that exposure to some of these chemicals may be linked to harmful health effects in humans and animals.
  — Kaycee Sloan, The Enquirer, 22 Aug. 2025
• But over the past 50 years, ecologists have come to value wetlands not only as wildlife habitats but also as carbon sinks, defenses against rising seas, and filters for harmful pollutants.
  — Kyra Morris, The Atlantic, 22 Aug. 2025