albert straus on the farm with cows

Carbon farming tackles California’s belching bovines

San Francisco Examiner

By Jessica Wolfrom

When it comes to climate change, cows have taken a reputational hit. These belching bovines have been villainized for releasing methane, a greenhouse gas with more than 25 times the heat-trapping power of carbon dioxide.

But now, a growing number of Bay Area farmers are working to repolish the image of the humble dairy cow, recasting their role from gaseous emitters to carbon-capturing machines and powering farmers’ ability to fight the impacts of climate change.

Chief among them is Albert Straus, founder and owner of Straus Family Creamery and Dairy in Marshall, an unincorporated town on the northeast shore of Tomales Bay. One of the first in the nation to take his farm organic in the early ’90s, Straus has garnered attention for feeding his cows seaweed, which cut down their methane output by more than 80%, according to research from UC Davis.

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A person wearing a hat, gloves, and work clothes stands at an outdoor research station at Correia Family Dairy, pouring a reddish liquid into a large funnel-shaped container connected to hoses and pipes. Several plastic sample bottles sit on the ground nearby, and shade cloths overhead provide cover. The setup includes pumps, tubing, and monitoring devices, suggesting a water, soil, or nutrient treatment experiment.

These very hungry microbes devour a powerful pollutant

PETALUMA, Calif. — The cows had to be deterred from messing with the
experiment.

Researchers from a Bay Area technology company had come to the sprawling
dairy farm north of San Francisco to test an emerging solution to planetwarming emissions: microscopic pink organisms that eat methane, a potent
greenhouse gas.

Kenny Correia, 35, of Correia Family Dairy, watched the team from Windfall Bio
working near the lagoons used to store manure from the farm’s several hundred
cows. The researchers erected a futuristic system of vats, pipes, tubes and shiny
metal supports. Then, when everything was assembled, they poured pink liquid
into one of the vats. “They were looking like mad scientists out there,” Correia
recounted.

He acknowledged initially thinking it was a “crazy idea” to integrate an outdoor
laboratory into a working farm. There was the potential for the cows to “be all
over it — licking it, pulling out wires and scratching on it,” he said.
But livestock farms are a significant source of methane emissions, and Windfall
wanted to see how much the microbes could help.

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