The record
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- Australian start-up Rumin8 is developing synthetic feed additives designed to cut the methane that cattle release during digestion.
- Breakthrough Energy Ventures, the climate investment firm founded by Bill Gates, led a US$12 million funding round for Rumin8 announced on 23 January 2023.
- A peer-reviewed 2025 study found an oil-based version of the additive cut methane production in beef steers by roughly 95% under trial conditions.
- A separate 2025 pasture-fed cattle study recorded smaller methane reductions of 16% to 24%, showing results vary by farming environment.
- The technology matters because cutting livestock methane could help slow near-term global warming without ending cattle farming.
What to watch next
- Results of commercial trials in Australia, New Zealand, Brazil and the US funded by the investment round
- Whether regulators approve the feed additive for widespread farm use
- Whether the additive can be made affordable and deliverable across different farming systems
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Named Australia · New Zealand · Brazil · United States · Bill Gates · Breakthrough Energy Ventures · Food and Agriculture Organization of the United Nations · Rumin8
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