Reuters: Brazilian President Luiz Inacio Lula da Silva said on Monday that a global climate deal could still be ready by a December summit in Copenhagen despite differences that resurfaced last week between rich and poor countries. The Group of Eight leading industrial countries agreed on Wednesday at its annual summit to support a goal of cutting global emissions by 50 percent by 2050 and of reducing emissions in wealthy countries by 80 percent. Developing countries like China, India …