RT null T1 2020 World Ozone Day posters produced by Europe and Central Asia A1 United Nations Environment Programme, K1 ozone layer YR 2020 FD 2020 LK https://wedocs.unep.org/handle/20.500.11822/33995 UL https://wedocs.unep.org/handle/20.500.11822/33995 NO To commemorate World Ozone Day, Europe and Central Asia Network produced a poster which is translated in different languages. DS UN Environment Document Repository RD Sep 18, 2026