Over the last century, agricultural soils in the U.S. have lost 60% of their original organic carbon content. This loss undermines productivity of famers and causes greenhouse gas emissions, nutrient loss, soil erosion, and the need for ever-increasing irrigation from depleted aquifers and other strained water sources. The Nature Conservancy addresses this and other soil health issues in its new “Roadmap for U.S. Soil Health: reThink Soil.”