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Monday, 14 December 2015

The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

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278. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

A.  helium
B.  ozone
C.  oxygen
D.  methane

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