<map version="1.0.1">
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<node TEXT="Earth's Atmosphere">
<node TEXT="Composition">
<node TEXT="Nitrogen (78%)"/>
<node TEXT="Oxygen (21%)"/>
<node TEXT="Trace gases (1%)"/>
</node>
<node TEXT="Layers">
<node TEXT="Troposphere"/>
<node TEXT="Stratosphere"/>
<node TEXT="Mesosphere"/>
<node TEXT="Thermosphere"/>
<node TEXT="Exosphere"/>
</node>
<node TEXT="Functions">
<node TEXT="Protection from Sun's harmful rays"/>
<node TEXT="Regulation of temperature and climate"/>
<node TEXT="Breathing and survival of life on Earth"/>
</node>
</node>
</map>