SAPPORO, Japan (AP) — Energy and environment ministers of the Group of Seven wealthy nations vowed to work to hasten the shift toward cleaner, renewable energy, but set no timetable for phasing out coal-fired power plants as they wrapped up talks on Sunday. The G-7 officials issued a communique laying out their commitments after talks in the northern Japanese city of Sapporo. The 36-page document was prepared in advance of a G-7 summit in May. Japan won endorsements from fellow G-7 countries for its own national strategy emphasizing so-called clean coal, hydrogen and nuclear energy to help ensure its energy…