Scientist, Tim Searchinger, has resigned from the World Resources Institute amid disagreement over how to tally forest carbon in accounting rules that are under development. Those rules, which are being drafted by Greenhouse Gas Protocol (GHG Protocol) — a global standard-setting body overseen in part by the non-profit — will shape how companies in the forest industry report their carbon footprints. A senior research scholar at Princeton University’s School of Public and International Affairs, Searchinger said that he will be leaving his role as technical director of land-related issues this month because of what he said are shortcomings in the GHG Protocol’s process in drawing up the new rules. …Danny Cullenward, a senior fellow at the University of Pennsylvania’s Kleinman Center for Energy Policy, stepped down from his seat on the body’s Independent Standards Board in June over the same issue. …The argument centers on two competing approaches to calculate carbon stores and emissions from forests.