ENEP427 Chapter Notes - Chapter 8: Sustainable Energy, Ecological Footprint, Smog

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Impact indicator = impact coefficient x inventory data. Ex of environmental coefficients - impact per kwh. Us doe"s national renewable energy laboratory (nrel) has partnered with athena and franklin to create database of life-cycle inventory coefficients to be used in life cycle analysis - work in progress. Air pollution and carbon emissions from combustion of fossil fuels. Energy use accounts for 90% of air pollution emissions in us, about 20% from stationary sources (power plants) and 70% from mobile sources (passenger vehicles) Total emissions are less than half what they were in 1970 despite increases in population, economy, and vehicles miles traveled. Ghg emissions are not yet regulated in us. Of the fossil fuels, natural gas has lowest rate, about 75% of oil products and 57% of coal. Biomass combustion is considered carbon neutral bc it emist biogenic carbon dioxide or carbon dioxide recently absorbed by vegetation from atmosphere. Coal has highest emissions rates for all pollutants.

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