"2010-11-26T00:00:00Z"^^ . "The air surrounding the earth, as a series of layers of different characteristics. Composed mainly of nitrogen and oxygen with traces of carbon, which acts as a buffer between the sun and the earth. The layers, extending away from the earth are in order: troposphere, stratosphere, mesosphere, thermosphere and exosphere"@en . . "2010-11-26T00:00:00Z"^^ .