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    "CCI",
    "Precursors",
    "Ammonia",
    "aerosol precursors",
    "satellite",
    "observation",
    "atmosphere",
    "ammonia",
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    "agriculture",
    "fertilizers",
    "livestock",
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    "EARTH SCIENCE>OCEANS>OCEAN CHEMISTRY>AMMONIA",
    "EARTH SCIENCE>ATMOSPHERE",
    "EARTH SCIENCE>AGRICULTURE",
    "EARTH SCIENCE>AGRICULTURE>AGRICULTURAL CHEMICALS>FERTILIZERS",
    "EARTH SCIENCE>HUMAN DIMENSIONS>ENVIRONMENTAL IMPACTS>BIOMASS BURNING",
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