Transcribed Image Text: You may not be familiar with all the gases shown above:
• O2: Oxygen gas makes up about 20% of the earth’s atmosphere.
• N2: Nitrogen gas makes up about 78% of earth’s atmosphere
• CO2: carbon dioxide gas makes up about 0.04% of earth’s atmosphere, but levels are increasing due to fossil fuel
combustion.
• TFE: tetrafluoroethane is a human-made gas used in air conditioning. Levels in the atmosphere are low (about 10
parts per trillion or 0.000000001%), but increasing
Which gases cause the greatest warming? Use evidence from your observations to support your statement.
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