Compilation
For each of the pollutants in the inventory emissions are typically estimated by multiplying the intensity of each relevant activity ('activity rate') in the geographical area and time span with a pollutant dependent proportionality constant ('emission factor').
Read more about this topic: Emission Inventory
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“The United States Constitution has proved itself the most marvelously elastic compilation of rules of government ever written.”
—Franklin D. Roosevelt (1882–1945)