Food Tank Explains: Carbon Farming

Why It Matters

By linking climate mitigation to farm profitability, carbon farming offers a scalable pathway to cut greenhouse‑gas emissions while bolstering food security, but uncertain accounting could undermine its credibility and impact.

Key Takeaways

• Carbon farming can sequester up to 1.85 Gt CO₂ annually
• Grassroots Carbon verified 1.9 million tons of soil carbon removals
• Cover crops, biochar, and reduced tillage boost soil organic carbon
• Improved soils increase yields, water retention, and resilience
• Measurement standards for soil carbon credits remain unsettled

Pulse Analysis

Agriculture accounts for roughly one‑third of global greenhouse‑gas emissions, largely because modern tillage and monoculture deplete soil organic carbon (SOC). Restoring SOC transforms soils from carbon sources into carbon sinks, with scientific estimates suggesting that best‑practice land management could capture up to 1.85 gigatons of CO₂ each year—comparable to the entire transportation sector’s footprint. This dual benefit of climate mitigation and enhanced soil health positions carbon farming as a critical lever for meeting the Paris Agreement’s 2 °C target, especially as droughts and floods strain conventional farming systems.

The operational side of carbon farming hinges on measurable, tradable carbon credits. Companies such as Grassroots Carbon have already verified 1.9 million tons of soil‑based carbon removals, providing farmers with a new income stream that offsets input costs and incentivizes practices like cover cropping, perennial planting, compost and biochar application, and no‑till or reduced‑till regimes. These techniques increase the quantity of carbon stored in root biomass and organic matter, improve water‑holding capacity, and often raise yields, creating a virtuous cycle where environmental and economic returns reinforce each other.

Despite its promise, carbon farming faces significant hurdles. No universally accepted protocol exists for measuring, reporting, and verifying soil carbon, leading to market uncertainty and potential double‑counting. Moreover, carbon stored in soils can be released if management practices revert or extreme weather events occur, challenging claims of permanence. Policymakers are therefore weighing standards development, incentive structures, and safeguards against rebound effects—such as farmland expansion or increased herbicide use in no‑till systems—to ensure that carbon farming delivers genuine, lasting climate benefits. As standards coalesce, the sector is poised to scale, offering a pragmatic bridge between climate goals and agricultural productivity.