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Summary
| Description |
English: This figure shows concentrations of methane in the atmosphere from hundreds of thousands of years ago through 2008. The
data come from a variety of historical studies and monitoring sites around the world |
| Date | |
| Source | https://www3.epa.gov/climatechange/pdfs/print_ghg-concentrations.pdf Archive |
| Author | U.S. Environmental Protection Agency |
Another Source: https://www.epa.gov/climate-indicators/climate-change-indicators-atmospheric-concentrations-greenhouse-gases
Licensing
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This image (or other media) is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:24, 29 March 2017 | | 615 × 627 (134 KB) | Raquel Baranow | Found a newer version, 2015 |
| 20:17, 29 March 2017 |  | 796 × 876 (188 KB) | Raquel Baranow | User created page with UploadWizard |
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