TY - GEN AU - United Nations Environment Programme PY - 2017 UR - https://wedocs.unep.org/handle/20.500.11822/26762 LA - English KW - ozone KW - ozone-depleting substance KW - ozone layer KW - global warming KW - hydrofluorocarbon KW - hydrochlorofluorocarbon KW - Ozone TI - OzoNews VolXVII - 16 September 2017: Special Montreal Protocol 30th Anniversary Ozone-Day issue M3 - Communication or other resource ER -