World leaders on Monday opened a climate summit in Egypt with a call from UN chief António Guterres for a “climate solidarity” pact between the developed and emerging economies. It would be “a pact in which all countries make an extra effort to reduce emissions this decade in line with the 1.5-degree [Celsius] goal,” Guterres said at the summit in the Egyptian coastal resort of Sharm el-Sheikh. “A pact in which wealthier countries and international financial institutions provide financial and technical assistance to help emerging economies speed their own renewable energy transition.” Guterres…