📖+10 XP
🎧+10 XP
✅+15 XP
Level A1 – BeginnerCEFR A1
2 min
78 words
- Scientists studied fish from many lakes over several years.
- Some lakes had contamination from a common insecticide.
- Polluted lakes had very few older fish remaining.
- Clean lakes still had many older fish living.
- Lab tests gave fish low insecticide doses over time.
- Low doses made fish show faster signs of getting old.
- Brief high doses caused quick death, not getting old.
- Losing older fish can harm reproduction and stability.
- The results raise concern for other animals and people.
Difficult words
- scientist — A person who studies nature or animals.Scientists
- contamination — Dirty or harmful material in water or land.
- insecticide — A chemical that kills insects.
- dose — A small amount of a medicine or chemical.doses
- reproduction — The process of having new animals or plants.
- stability — The state of being steady or not changing.
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Do you live near a lake?
- Are you worried about water pollution?
- Have you seen older fish in a lake?
Related articles
24 Nov 2025
7 Aug 2025
24 Oct 2025
Low-cost cooling could help Bangladesh garment workers
A University of Sydney study, published in The Lancet Planetary Health on Monday (20 October), tested simple low-cost cooling in a chamber that mimicked extreme factory heat. Fans and water partly restored productivity; a reflective roof cut indoor temperature by 2.5°C.
24 Dec 2025
5 Dec 2025