
Xi Jinping, China's president, right, and U.S. President Barack Obama, stand during a state visit arrival ceremony on the South Lawn of the White House in Washington, D.C., U.S., on Tuesday, April 28, 2015. China will start a national pollution-trading system to cut global warming emissions and make a substantial financial commitment to help poorer countries move away from fossil fuels, two U.S. officials said yesterday. Photographer: Andrew Harrer/Bloomberg *** Local Caption *** Xi Jinxing; Barack Obama
Andrew Harrer/Bloomberg