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Digesters usually cut methane at California dairies (Level A1) — white and black checkered textile

Digesters usually cut methane at California dairiesCEFR A1

29 Apr 2026

LevelA1
A2
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Adapted from Jules Bernstein - UC Riverside, Futurity • CC BY 4.0

Photo by Kathrine Coonjohn, Unsplash

Level A1 – Beginner
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 waste
    digesters, digesters'
  • methane — a gas from animal waste
  • greenhouse gas — a gas that warms the planet
  • plume — a cloud of gas in the air
    plumes
  • emission — gas or smoke released into air
    emissions
  • 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?

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