Xinhua: Climate change is an urgent issue that needs a global solution, former U.S. vice president Al Gore said here Friday. “We are running out of time…we must have a planetary solution to a planetary crisis,” the Nobel laureate told a session of the World Economic Forum’s annual meeting in Davos. His call for urgency came as world leaders prepare to meet at a United Nations conference on climate change in Copenhagen at the end of this year to set a global framework for tackling the …