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The atmosphere is a mixture of gases that surrounds the Earth. It helps make life possible by providing us with air to breathe, shielding us from harmful ultraviolet (UV) radiation coming from the Sun, trapping heat to warm the planet, and preventing extreme temperature differences between day and night.

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The different layers of the atmosphere

The Troposphere. This is the lowest part of the atmosphere - the part we live in. ...

The Stratosphere. This extends upwards from the tropopause to about 50 km. ...

The Mesosphere. ...

The Thermosphere and Ionosphere. ...

The Exosphere. ...

The Magnetosphere.

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Particulate matter (PM10 and PM2. ...Ozone (O3)Nitrogen dioxide (NO2)Carbon monoxide (CO)Sulphur dioxide (SO2)

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contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere

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Pollutants of major public health concern include particulate matter, carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide.

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What is the Atmosphere | Layers of Atmosphere | Science for Kids