Xinhua: Japan and the United States plan to hold a summit of major carbon emitters shortly before the Group of Eight summit scheduled next July in Japan, Kyodo News said Monday. Tokyo and Washington have started working-level talks on the plan to convene the "Environment and Energy Summit" of G-8 leaders and their partners from other carbon emitters ahead of the G-8 summit to be held July 7-9 in northern Japan’s Hokkaido, the report said, citing Japanese government sources. …