2007 Greenhouse Gas Emissions from Selected Iowa Source Categories

(2008) 2007 Greenhouse Gas Emissions from Selected Iowa Source Categories. Natural Resources, Department of

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Abstract

The Department’s 2007 Greenhouse Gas Inventory is a refinement of previous statewide inventories. It is a bottom-up inventory of two sectors – fossil fuel combustion at federally-recognized major sources of air pollution and fossil fuel combustion and ethanol fermentation at dry mill ethanol plants. This is the first bottomup greenhouse gas inventory conducted for Iowa and the first bottom-up greenhouse gas inventory of ethanol plants in the nation that the Department is aware of. In a bottom-up inventory, facility-specific activity data is used to calculate emissions. In a top-down inventory, aggregate activity data is used to calculate emissions. For example, this bottom-up inventory calculates greenhouse gas emissions from the fossil fuel combustion at each individual facility instead of using the total amount of fossil fuel combusted state-wide, which would be a top-down inventory method. The advantage to a bottom-up inventory is that the calculations are more accurate than a top-down inventory. However, because the two methods differ, the results from a bottom-up inventory are not directly comparable to a top-down inventory.

Item Type: Departmental Report
Keywords: dry mill ethanol, fossile fuel, emissions
Subjects: Laws and regulations > Environmental laws and regulations
Natural resources and environment > Energy resources > Petroleum and natural gas
Natural resources and environment > Airquality
Natural resources and environment > Energy resources > Alternative energy resources
ID Code: 6580
Deposited By: Tom Keyser
Deposited On: 02 Oct 2008 16:31
Last Modified: 02 Oct 2008 16:31
URI: http://publications.iowa.gov/id/eprint/6580

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