Nitrogen (N₂) is the most abundant gas in Earth's atmosphere, including the troposphere. This cartoon also depicts several other tropospheric gases, including oxygen (O₂), carbon dioxide (CO₂), water vapor (H₂O), methane (CH₄), sulfur dioxide (SO₂), and carbon monoxide (CO).
Image courtesy UCAR, modified by Windows to the Universe staff (Randy Russell).

This cartoon shows some of the gases in Earth's troposphere. There is more nitrogen (N₂) than anything else. There is also a lot of oxygen (O₂). The cartoon also shows carbon dioxide (CO₂), water vapor (H₂O), methane (CH₄), sulfur dioxide (SO₂), and carbon monoxide (CO).
Image courtesy UCAR, modified by Windows to the Universe staff (Randy Russell).

This cartoon shows some of the gases in the lowest layer of Earth's atmosphere. Most of the gas is nitrogen (N₂). There is also a lot of oxygen (O₂). The cartoon also shows carbon dioxide (CO₂), water vapor (H₂O), methane (CH₄), sulfur dioxide (SO₂), and carbon monoxide (CO).
Image courtesy UCAR, modified by Windows to the Universe staff (Randy Russell).

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