TROPOSPHERE

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 The troposphere is the layer of the atmosphere nearest to earth.

—  The troposphere extends from Earth's surface up to a height of  16 km.

—  The temperature decreases as the altitude increases.

—  Tropopause is seen at the top of this layer.

—  Harmful ozone is found here…IT CREATES SMOG!

—  All weather happens in the troposphere.

—  Tropopause a layer of cold air (about -60°C), which forms the top of the

troposphere and creates a "cold trap" that causes atmospheric water vapor to condense.

Smog - Pollution formed by the interaction of pollutants and sunlight.(photochemical smog)