California timber firms could emerge as big winners in the state’s fight against global warming, earning millions of dollars through the sale of carbon credits if a new set of rules are approved by the Air Resources Board this week. READ FULL STORY | REACT | FAQ | CALIFORNIA WATCH | CARBON WATCH

Mark Schapiro specializes in international and environmental stories. His award-winning work appears in all media: in publications such as Harpers, The Atlantic, Mother Jones and Yale 360; on television, including PBS FRONTLINE/World and KQED; on public radio including Marketplace; and on the web. He is currently writing a book for Wiley & Co. investigating the backstory to our carbon footprints. His previous book, "EXPOSED: The Toxic Chemistry of Everyday Products and What’s at Stake for American Power," reveals the health and economic implications of the tightening of environmental standards by the European Union.

Sarah Terry-Cobo is a reporter based in Oklahoma City, specializing in environmental science and policy and Latin American issues. She is a native Oklahoman, where she graduated from the University of Tulsa with a bachelor’s degree in environmental policy. After college she moved to California to attend UC Berkeley, where she graduated with a master’s in journalism and master’s in Latin American studies. She began as a print reporter, but has expanded her skills with audio production and data visualizations.