New York Times: A decrease in water vapor concentrations in parts of the middle atmosphere has contributed to a slowing of Earth`s warming, researchers are reporting. The finding, they said, offers part of the explanation for a string of years with relatively stable global surface temperatures. Despite the decrease in water vapor, the study`s authors said, the overall trend is still toward a warming climate, primarily caused by a buildup in emissions of carbon dioxide and other heat-trapping gases …