Data and Charts on Concentration of Greenhouse Gases in the Atmosphere –



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  • “Global atmospheric concentrations of carbon dioxide, methane, nitrous oxide, and certain manufactured greenhouse gases have all risen significantly over the last few hundred years (see Figures 1, 2, 3, and 4).
  • Historical measurements show that the current global atmospheric concentrations of carbon dioxide, methane, and nitrous oxide are unprecedented compared with the past 800,000 years (see Figures 1, 2, and 3).
  • Carbon dioxide concentrations have increased substantially since the beginning of the industrial era, rising from an annual average of 280 ppm in the late 1700s to 401 ppm as measured at Mauna Loa in 2015—a 43 percent increase (see Figure 1). Almost all of this increase is due to human activities.1
  • The concentration of methane in the atmosphere has more than doubled since preindustrial times, reaching approximately 1,800 ppb in recent years (see the range of measurements for 2014 and 2015 in Figure 2). This increase is predominantly due to agriculture and fossil fuel use.2


Charts and data from the EPA on the concentration of greenhouse gases in the atmosphere and the increases since the early 20th century and prior.


  • None.


  • Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases


  • Environmental Protection Agency


  • April 2016 (Check source for updates to date)


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  1. Pingback: Credible Sources Proving Climate Change is Real and Man-Made - Full Guide - CRS

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