TY - GEN AU - United Nations Environment Programme PY - 2018 UR - https://wedocs.unep.org/handle/20.500.11822/26672 LA - English KW - ozone KW - ozone-depleting substance KW - ozone layer KW - hydrofluorocarbon KW - refrigeration KW - air-conditioning TI - OzoNews Volume XVIII - 15 May 2018 M3 - Communication or other resource ER -