Backpacks For Cows Collect Their Fart Gas And Store It For Energy

Researchers put plastic backpacks on cows, then inserted tubes into their rumens (their biggest digestive tract). Then, they extracted the methane--about 300 liters a day. That's enough to run a car, or a fridge for 24 hours.

"[We] believe that such technology could be used to collect methane on larger scale, and even imagine a future farm with a couple of these cows used to provide energy to satisfy the farm's needs," Sorondo says.

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