- Description: The sharp reduction of ozone levels in the 80's was halted in the 90's with the phasing out of major ozone depleting substance (i.e. CFCs and halons).
- Source info: NASA Image uploaded to Wikipedia on October 25, 2012. Data from TOMS (Total Ozone Mapping Spectrometer).
- License: Public Domain
Minimum Concentration of Ozone Recorded Each Year from 1979 to 2013's Quests