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  - display_name: 'Scientist : William Elder (National Park Service) '
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create_dt: 2013-10-22T10:32:00
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    caption: 'Left: A stylized representation of the natural greenhouse effect. Most of the sun’s radiation reaches the Earth’s surface. Naturally occurring heat-trapping gases, including water vapor, carbon dioxide, methane, and nitrous oxide, do not absorb the short-wave energy from the sun but do absorb the long-wave energy re-radiated from the Earth, keeping the planet much warmer than it would be otherwise. Right: In this stylized representation of the human-intensified greenhouse effect, human activities, predominantly the burning of fossil fuels (coal, oil, and gas), are increasing levels of carbon dioxide and other heat-trapping gases, increasing the natural greenhouse effect and thus Earth’s temperature. (Figure source: modified from National Park Service<tbib>a6a29141-7f5c-4353-b0e0-38b8cc2f9dcf</tbib>).'
    chapter_identifier: appendix-climate-science-supplement
    create_dt: 2013-10-23T10:33:00
    identifier: human-influence-on-the-greenhouse-effect
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    title: Human Influence on the Greenhouse Effect
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    usage_limits: Free to use with credit to the original figure source.
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    caption: '(left) A stylized representation of the natural greenhouse effect. Most of the sun’s radiation reaches the Earth’s surface. Naturally occurring heat-trapping gases, including water vapor, carbon dioxide, methane, and nitrous oxide, do not absorb the short- wave energy from the sun but do absorb the long-wave energy re-radiated from the Earth, keeping the planet much warmer than it would be otherwise. (right) In this stylized representation of the human-intensified greenhouse effect, human activities, predominantly the burning of fossil fuels (coal, oil, and gas), are increasing levels of carbon dioxide and other heat-trapping gases, increasing the natural greenhouse effect and thus Earth’s temperature. (Figure source: modified from National Park Service10).'
    chapter_identifier: appendix-faqs
    create_dt: 2013-10-22T10:32:00
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    title: Human Influence on the Greenhouse Effect
    url: http://nca2014.globalchange.gov/report/appendices/faqs/graphics/human-influence-greenhouse-effect
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title: 'Human Influence on the Greenhouse Effect - Natural Greenhouse Effect'
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