Climate Change > Understanding GHG Emissions > Washington State GHG Inventory

Washington State Greenhouse Gas Emissions Inventory, 1990-2008

The state’s greenhouse gas inventory estimates Washington’s anthropogenic GHG emissions for the period from 1990 to 2008. GHG emission estimates were developed using a set of generally-accepted principles and guidelines for state GHG emission estimates, with adjustments for Washington-specific data and context, as appropriate.

The current inventory was published in December, 2010. This inventory updates the 2007 Washington inventory. The Departments of Ecology and Commerce will update this greenhouse gas inventory for the state every two years as required by state law. The state greenhouse gas reporting rules that took effect January 1, 2011 will help the agency develop a comprehensive inventory of emissions from all significant sectors of the Washington economy.