- Researchers studied cleaning of plastic before recycling facilities today.
- Some cleaning methods can release harmful chemicals into water.
- The study is from Iowa State University research team.
- It looked at polypropylene for dairy tubs and food.
- Some methods did not release chemicals in tests here.
- Ultrasonic and detergent methods released two chemicals in tests.
- Reused wash water showed chemical levels that rose quickly.
- Researchers suggest ways to reduce these chemical risks now.
Difficult words
- researcher — person who studies and tests thingsResearchers
- chemical — substance that can change thingschemicals
- recycling — process to make used items new
- ultrasonic — uses very high sound waves
- detergent — soap used to clean things
- reuse — use something again instead of throwing awayReused
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Do you clean plastic before you recycle it?
- Do you ever reuse wash water when you wash things?
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