New research suggests the Earth will pass multiple dangerous tipping points at 1.5 degrees Celsius of warming, the U.N. limit exceeded for much of the last two years.By Bob BerwynSea levels in some parts of the world could be rising by as much as 8 to 12 inches per decade within the lifetime of today’s youngest generations, outpacing the ability of many coastal communities to adapt, scientists warned in a new study published this week.