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Level A1 – BeginnerCEFR A1
2 min
73 words
- Digesters seal manure ponds and trap gas.
- They capture methane and turn it into fuel.
- Methane is a much stronger greenhouse gas.
- Small releases of methane still cause problems.
- Researchers studied farms across California for years.
- Satellites and aircraft helped find big plumes.
- The team looked at many digesters' emissions.
- Most digesters reduced the number of strong plumes.
- But a few digesters had very large leaks.
- Researchers say we must monitor systems carefully.
Difficult words
- digester — machine that treats animal wastedigesters, digesters'
- methane — a gas from animal waste
- greenhouse gas — a gas that warms the planet
- plume — a cloud of gas in the airplumes
- emission — gas or smoke released into airemissions
- monitor — to watch something over time
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Have you ever visited a farm?
- Would you check systems for leaks if you worked on a farm?
- Do you think using methane as fuel is good?
