478 ppm

Climate Change: Plants Choke on too Much Carbon By Brian Stallard Jun 15, 2015 03:12 AM EDT CO2 is plant food Earth’s current atmospheric CO2 concentration is almost 390 parts per million (ppm).  Adding another 300 ppm of CO2 to the air has been shown by literally thousands of experiments to greatly increase the growth […]

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the evolution of globally aggregated economic wealth

Thermodynamics of long-run economic innovation and growth Timothy J. Garrett (Submitted on 15 Jun 2013) This article derives prognostic expressions for the evolution of globally aggregated economic wealth, productivity, inflation, technological change, innovation and growth. The approach is to treat civilization as an open, non-equilibrium thermodynamic system that dissipates energy and diffuses matter in order […]

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