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The only atmospheric layer containing measurable amounts of water is the troposphere. 

The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer. 2) Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.

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Answer:

b. troposphere.

Explanation:

   The troposphere is the lowest layer of the earth's atmosphere, being the region in which we live and where meteorological phenomena occur.

   Its height varies with the point away from the surface. At the poles, for example, it reaches 7 km altitude and 16 km in the Ecuador region.

    It is in the troposphere that rain, lightning, clouds and air pollution occur.

    The meaning of troposphere comes from the Greek "tropos" and means change.

The chemical composition of the troposphere is as follows:

    Oxygen - 21%

    Argon - 0.9%

    Water vapor - 0.4%

    Carbon Dioxide - 0.04%

    The troposphere concentrates most of the water vapor from Earth's atmosphere. The amount of vapor results from the process of evaporation and transpiration of the earth's surface.

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