IEA Chief Economist Fatih Birol

IEA Chief Economist Fatih Birol

Carl Court/AFP/Getty Images

“If we do not have an international legally binding agreement soon, and if it doesn’t give a boost to a major investment wave of clean energy technologies by 2017, the door to 2 degrees will be closed forever,” Fatih Birol, the IEA’s chief economist in Paris, said in an interview yesterday.