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What makes Earth’s climate so moderate? Sun Atmosphere The Earth is surrounded by a blanket of air, which we call the atmosphere. Gas Composition of the Atmosphere Solar radiation They keep our earth warm and protect us from the direct effects of the Sun’s radiation. Earth You Are Here ! Layers of the Atmosphere The key layer for people living on the surface of the Earth, is the troposphere. It gives us the air that we breathe and our weather. Altitude of the Layers As altitude increases, air temperature falls in the Troposphere, rises in the Stratosphere, falls again in the Mesosphere, and rises again in the Thermosphere (due to the suns ability to boost temperatures).
