origins: 609

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id titleSnapshot title descriptionSnapshot description producer citationFull attribution attributionShort versionProducer urlMain urlDownload dateAccessed datePublished license
609 Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases - Carbon Dioxide Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases   This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time. The data contains concentrations of carbon dioxide in the atmosphere from hundreds of thousands of years ago through 2021, measured in parts per million (ppm). The data come from a variety of historical ice core studies and recent air monitoring sites around the world. United States Environmental Protection Agency United States Environmental Protection Agency (EPA) - Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases (2022) Global atmospheric concentration measurements for carbon dioxide, methane, and nitrous oxide come from a variety of monitoring programs and studies published in peer-reviewed literature. More details can be found on [their technical documentation](https://www.epa.gov/sites/default/files/2021-03/documents/ghg-concentrations_td.pdf). EPA based on various sources (2022) EPA   https://www.epa.gov/climate-indicators/climate-change-indicators-atmospheric-concentrations-greenhouse-gases https://www.epa.gov/system/files/other-files/2022-07/ghg-concentrations_fig-1.csv 2024-04-17 2022-07-01 
{
    "url": "https://edg.epa.gov/epa_data_license.html",
    "name": "Public domain"
}

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