Joe Romm at Climate Progress writes Labor Day 2050: Global Warming And The Coming Collapse Of Labor Productivity: Global warming is projected to have a serious negative impact on labor productivity this century. Here is a look at what we know. In 2013, a NOAA study projected that “heat-stress related labor capacity losses will double globally by 2050 with a warming climate.” If we stay near our current greenhouse gas emissions pathway, then we face a potential 50 percent drop in labor capacity in peak months by century’s end. Many recent studies project a collapse in labor productivity from business-as-usual carbon emissions and warming, with a cost to society that may well exceed that of all other costs of climate change combined.