Greenhouse Gases

Current climate conditions trends and averages: Greenhouse Gases (GHG's) and relevant data products.

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The National Academy of Sciences

National Research Council, Board on Atmospheric Science & Climate

Increased Emissions

Carbon Dioxide Methane, Nitrous Oxide, CFC's*

*Chlorofluorocarbons are Industrially produced High GWP (Global Warming Potential Gases)

Annual Greenhouse Gas Index


Scripps CO2 Monitor


Concentrations of the greenhouse gas carbon dioxide in the global atmosphere are surpassing 400 parts per million (ppm) for the first time in human history



Recent Mauna Loa CO2

CO2 Trend for Mauna Loa


CO2 Trend for Mauna Loa PDF Version

Recent Global CO2

Global CO2

PDF Version

Full Mauna Loa CO2 record

Mauna Loa CO2


PDF Version

Global CO2 Emissions from Fossil-Fuel Burning, Cement Manufacture, and Gas Flaring: 1752-2006

Global Carbon Dioxide (CO2) emissions from fossil-fuels 1900-2008

Line graph of global carbon dioxide emissions from fossil fuels for 1900 through 2008. The line graph shows a slow increase from about 2,500 teragrams of carbon dioxide emissions in 1900 to about 5,000 teragrams of carbon dioxide emissions in 1950. After 1950, the increase in carbon dioxide emissions is more rapid, reaching approximately 32,000 teragrams of carbon dioxide in 2008.




Global CH4



Global CH4



Nitrous Oxide (N2O)

Global N2O


Global N2O



Sulfur Hexafluoride



Global N2O


Global N2O


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