New York Times: At 1 p.m. on Sunday, tens of thousands of demonstrators in Manhattan are expected to make as much noise as they can with whistles, trumpets, even the tolling of church bells to raise an alarm about the risks of climate change. Similar demonstrations are planned across the United States and in 161 other countries. Two days later, that show of unity will most likely give way to political discord. The United Nations is convening on Tuesday the largest gathering of world leaders ever devoted to...