If carbon emissions continue to damage the andes mountain glaciers, the lives of millions of people dependent on the run off will be affected

True
 Because the glacier will melt as a result and in no time the glaciers will have vanished from the mountains. There will be no more runoff.It is one of the major evidence of the effect of pollution and global warming.

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen