Reuters: Former U.S. vice-president Al Gore was quoted as saying he believed a global climate deal would be agreed in Copenhagen later this year because a “political tipping point” had been reached. Gore, who won an Oscar for his 2006 climate change documentary “An Inconvenient Truth,” said he believed the support of world leaders, including U.S. President Barack Obama, and many business leaders, had given political momentum to the issue. Tackling the global economic crisis would …