What atmospheric layer protects Earth from UV rays?

让地球远离紫外线伤害的大气层是？

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Atmospheric layer is a part most active in global environment.

大气层是全球环境各组成部分中最活跃的一个部分。

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This contrast may show the feature of the effect of the urban buildings on the wind profiles in lower atmospheric layer on the part of local climate.

这种差异能够反映出城市建筑群对低层大气风廓线影响的局地气候特征。

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Ozone is a protective atmospheric layer found at an altitude of about 25 kilometers (15.5 miles).

CNN: Ozone hole grows in 2008