Dr. Mike Ryan, USDA Forest Service Research Forest Ecologist, presented a scientific synthesis of the forest carbon cycle. The synthesis covers the entire US, but Dr. Ryan focused on the western US for this webinar. Forests play a key role in the carbon cycle and their growth and harvested wood products currently offsets 12-19% of U.S. fossil fuel emissions. The cycle of forest growth, death, and regeneration and the use of wood removed from the forest complicate efforts to understand and measure forest carbon pools and flows. The synthesis explains these processes and examines the science behind mechanisms proposed for increasing the amount of carbon stored in forests and using wood to offset fossil fuel use. This webinar was hosted by the Southwest Fire Science Consortium (http://swfireconsortium.org/).