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Although both nitrogen and oxygen are essential to human life on the planet, they have little effect on weather and other atmospheric processes. The variable components, which make up far less than 1 percent of the atmosphere, have a much greater influence on both short-term weather and long-term climate. For example, variations in water vapor in the atmosphere are familiar to us as relative humidity. Water vapor, CO2, CH4, N2O, and SO2 all have an important property: they absorb heat emitted by the earth and thus warm the atmosphere, creating what we call the "greenhouse effect." Without these so-called greenhouse gases, the surface of the earth would be about 30 degrees Celsius cooler - too cold for life to exist as we know it. Though the greenhouse effect is sometimes portrayed as a bad thing, trace amounts of gases like CO2 warm our planet's atmosphere enough to sustain life.Global warming, on the other hand, is a separate process that can be caused by increased amounts of greenhouse gases in the atmosphere.

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11y ago
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14y ago

The lowest, densest part, the troposphere.

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Q: What is earth's atmosphere that sustain life?
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oxygen and sunlight


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NO. It has no breathable atmosphere.


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