United Press International: Former U.S. Vice President Al Gore Friday called on world leaders to become more involved in hammering out a global climate deal, amid hopes that the United States will take the lead starting next year. Gore said heads of state should get “personally involved” by meeting “several times” over the coming 12 months to ensure that an ambitious climate-protection treaty is signed at a U.N. summit in late 2009 in Copenhagen, Denmark. But before Copenhagen comes Poznan: Delegates from …