Halogens are known to decrease the levels of stratospheric ozone. The latest measurements show that something similar occurs in the lower atmosphere over tropical oceans
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/sun-sea-and-ozone-destruction
[2] http://admin.indiaenvironmentportal.org.in/category/author/roland-von-glasow
[3] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases