The ozone layer thins — but then starts healing. See the other images: http://bit.ly/1IAmlMv via @voxdotcompic.twitter.com/C6hKUIMSXr
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The ozone layer thins — but then starts healing. See the other images: http://bit.ly/1IAmlMv via @voxdotcompic.twitter.com/C6hKUIMSXr