"Advocates say the long-awaited farm bill could help fix that."
"Dirt, it turns out, isn’t just worm poop. It’s also a humongous receptacle of carbon, some 2.5 trillion tons of it — three times more than all the carbon in the atmosphere.
That’s why if you ask a climate wonk about the U.S. farm bill — the broad, trillion-dollar spending package Congress is supposed to pass this year (after failing to do so last year) — they’ll probably tell you something about the stuff beneath your feet. The bill to fund agricultural and food programs could put a dent in the country’s greenhouse gas emissions, some environmental advocates say, if it does one thing in particular: Help farmers store carbon in their soil.
The problem is, no one really knows how much carbon farmers can store in their soil.
“There’s still a ton of research that’s needed,” said Cristel Zoebisch, who analyzes federal agriculture policy at Carbon180, a nonprofit that promotes carbon removal.
Farmers and ranchers interact with carbon more than you might think. Draining a bog to plant rows of soybeans, for example, unleashes a lot of carbon into the air, while planting rows of shrubs and trees on a farm — a practice called alley cropping — does just the opposite, pulling the element out of the air and putting it into the earth. If America’s growers and herders made sure the carbon on their land stayed underneath their crops and their cows’ hooves, then some scientists say the planet would warm quite a bit less. After all, agriculture accounts for some 10 percent of the United States’ greenhouse gas emissions."
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