Isro today successfully launched a cryogenic sampler payload-- an instrument to measure ozone depleting substances in the earth's atmosphere -- using a ballon for Germany-based Max Planck Institute.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/isro-payload-measure-ozone-eaters
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/economic-times-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-layer