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Carbon vs. energy intensity / Maximilian Auffhammer, Energy economics exchange, 4/01/2013http://energyathaas.wordpress.com/2013/01/14/carbon-vs-energy-intensity/Modeling the future emissions of global carbon is big business (albeit on an academic scale). There are dozens of groups with their more or less black box models, which if fed scenarios for e.g. income, population and technological change, will produce trajectories of global, regional and sometimes national emissions of CO2 and other greenhouse gases.  These trajectories matter as climate modelers use them to project future climate under higher atmospheric concentrations of CO2...