Improving inventory methods for land-based sources and sinks of greenhouse gases (GHG) is a core tenet of the U.S. Climate Alliance’s Natural and Working Lands (NWL) Challenge. Over the past two years, the U.S. Climate Alliance and World Resources Institute (WRI) have provided technical support to states pursuing this objective through working group webinars and discussions, individual state outreach and engagement with federal agencies on state inventory priorities.  

The Guide to NWL Inventory Improvements is intended to help advance states’ progress and evaluates current NWL inventory methods among U.S. Climate Alliance states, identifies gaps, and provides information and resources to advance improvements to data and methods that satisfy key objectives for NWL inventories. 

Portions of this Guide were updated in August 2022 to reflect inventory improvements at the federal level.