The world’s accounting system for carbon emissions, run by the United Nations, disregards capital investments in future coal-fired and natural-gas power plants that will commit the world to several decades and billions of tons of greenhouse gas emissions, according to a new study from Princeton University and the University of California-Irvine published Aug. 26 in the journalEnvironmental Research Letters. In the paper, Robert Socolow, a Princeton professor, emeritus, of mechanical and aerospace engineering, and co-author Steven Davis, a professor of…