Grace Perry, CALIFORNIA CLIMATE & AGRICULTURE NETWORK (CALCAN)
The natural and working lands recommended carbon sink actions were selected by scientists from more than 50 carbon storage pathways because of their low cost and productivity estimates. In total, the study estimates that natural and working lands can sequester an estimated 25.5 million tons of carbon annually. Other studies suggest that natural and working lands climate strategies can sequester even greater amounts of carbon, but not without scaling up and accelerating better management of natural and working lands.
Natural and working lands solutions
Aligning with the variety of natural and working landscapes present throughout California, the LLNL report recommends a suite of natural and working lands interventions to achieve emission reductions—including forest, wetland and grassland restoration, and healthy soils practices. Additionally, the report acknowledges the importance of reducing the likelihood of natural and working lands to act as a carbon emitter through land preservation and wildfire management.
Forest, wetland and grassland practices
Forest, wetland and grassland interventions consist of scaling up restoration practices that enhance carbon sequestration capacity. Reforestation and changes to forest management are among the recommended practices.
Soil practices
The potential for increasing carbon sinks in soils is well documented. As such, the LLNL researchers focused heavily on the potential of soil emission reduction drawing on their own extensive research. They propose California adopt a broad range of healthy soils practices—including cover cropping and composting—to meet the carbon sequestration potential of natural and working lands. They also acknowledge the importance of reducing the rate of carbon emission from soils, which can be achieved by limiting physical disturbance through reduced or no-till farming. In total, the near-term potential for carbon sequestration in California soils is estimated to be around 3.9 million tons of CO2 per year. This yields a total of 25.5 million tons of CO2 per year of sequestration potential by 2045 when combined with other natural and working lands solutions.