Pre-Industrial Revolution, the concentration of CO2 remained around 280 parts per million by volume (ppm). In 2009, the concentration increased to about 386 pmm. Including other greenhouse gases, the total effect was 464 ppm CO2 equivalents.
CSS Factsheets, U.S. Cities
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CSS Factsheets, U.S. Cities
Research Area:
Research Project:
CSS Factsheets
Publication Type:
Factsheet
CSS Publication Number:
CSS09-06 Date Published:
2009
Full Citation:
Durfee, Elizabeth, Matt Durham and Greg Keoleian. 2009. CSS Factsheets, U.S. Cities. University of Michigan, Ann Arbor: 1-2.