The United Nations says the world is getting hotter and is getting close to passing one of the limits set by global leaders five years ago. Wednesday’s climate science update says the world is only a few tenths of a degree away from the goal of limiting warming to 2.7 degrees above late 19th century temperatures. If warming tops that mark, scientists say the risks of more harmful climate effects increase tremendously. The head of the World Meteorological Organization says we may reach that level of heat in a decade. The last five years have warmed tremendously compared to earlier.