Deadly with extreme weather now, climate change is about to get so much worse. It is likely going to make the world sicker, hungrier, poorer, gloomier and way more dangerous in the next 18 years with an “unavoidable” increase in risks, a new United Nations science report says. And after that watch out. The UN Intergovernmental Panel on Climate Change report said Monday if human-caused global warming isn’t limited to just another couple tenths of a degree, an Earth now struck regularly by deadly heat, fires, floods and drought in future decades will degrade in 127 ways with some being “potentia…