In this paper we describe the methods used to develop the open source Aviation Emissions Inventory Code and produce a global emissions inventory for scheduled civil aviation, with quantified uncertainty. We estimate that in 2005, scheduled civil aviation was responsible for 180.6 Tg of fuel burn, which agrees to within 4% of other published emissions inventories for 2004 and 2006. By comparing the Aviation Emissions Inventory Code with flight data records, we show that the mean bias in predicted fuel burn at the airport-pair level is +1% for an ensemble of 132 flights, and less than 10% for 5 of the 6 aircraft types used in the validation.
Jeffrey T. Young's critique of the work of Nicholas Georgescu-Roegen and Herman E. Daly questions the relevance of the entropy law for economic analysis and provides a concise, faithful summary of the positions of Georgescu-Roegen and Hollister Toronto Locations
Daly. Along the way, however, Young produces an alternative model of natural resource depletion that is based upon questionable interpretations of the laws of thermodynamics. In particular, Young's claim that natural resource economics can be divided into conservation-law orientations
and entropy-law orientations and his claim that the entropy law pertains to energy but not to matter seem unsupportable from a scientific Hollister Canada Stores