Kathleen Adams - Northern Virginia Community College, Historic Preservation and Public History Certificate Program
Rachel Bhattacharyya - Santa Fe College
Agency
Environmental Protection Agency
Branch
Executive
Title
Climate Change Indicators in the United States: Atmospheric Concentrations of Greenhouse Gases - www.epa.gov/climate-indicators - Updated August 2016
Atmospheric Concentrations of Greenhouse Gases: This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time. Updated August 2016)