Associated Press: Al Gore said Tuesday the world must act quickly to slow the melting of the world’s polar ice packs and glaciers before it reaches a critical rate for global warming. “We have to act and we have to act quickly because we don’t want to cross this tipping point,” the Nobel peace laureate and former U.S. vice president told a meeting of foreign ministers, experts and scientists from the most affected countries. The meeting, called “Melting Ice Regional Dramas, Global Wake-Up Call” …