U.S. Secretary of State John Kerry attends the Climate and Clean Energy Investment Forum at the Department of State in Washington D.C., capital of the United States, Oct. 20, 2015. The two-day Climate and Clean Energy Investment Forum, co-hosted by the U.S. Department of State, Georgetown University, and Google, is focusing on investments targeting clean energy, energy efficiency, and climate change in emerging markets. (Xinhua/Bao Dandan)
