Soil carbon is currently being monitored in European national greenhouse-gas (GHG) inventories. Reviewing the data and methods, we find that unreported losses could be around 70 MtCO₂ yr^–1 in croplands, and unreported gains could be around 15 MtCO₂ yr^–1 in grasslands and 45 MtCO₂ yr^–1 in forests. The share of European Union (EU) forest area for which soil carbon is being accurately reported is at most 33%, and more likely close to 24%. Accuracy is even worse for grasslands and croplands. Widespread adoption of key carbon-farming practices (peatland restoration, agroforestry, substituting maize with grass) could remove an additional 150–350 MtCO₂ yr^–1. Yet, if effective policies lead to realizing this potential, current GHG inventories would not capture their climate mitigation benefits.

目前正在欧洲国家温室气体 (GHG) 清单中监测土壤碳。回顾数据和方法，我们发现农田未报告的损失可能约为 70 MtCO ₂  yr ^–1 ，草原未报告的收益可能约为 15 MtCO ₂  yr ^–1和森林中的 45 MtCO ₂  yr ^–1。准确报告土壤碳的欧盟 (EU) 森林面积份额最多为 33%，更可能接近 24%。草地和农田的准确性甚至更差。_{广泛采用关键的碳农业实践（泥炭地恢复、农林业、用草代替玉米）可以在2} 年内额外减少 150–350 MtCO^–1。然而，如果有效的政策能够实现这一潜力，那么当前的温室气体清单将无法获得其减缓气候变化的好处。