TY - GEN AU - United Nations Environment Programme PY - 1989 SN - 92 807 1247 0 UR - https://wedocs.unep.org/handle/20.500.11822/29860 LA - English KW - ozone-depleting substance KW - ozone layer KW - global warming KW - carbon tetrachloride KW - toxic substance KW - chemical KW - air-conditioning KW - heat pump TI - Technical Progress on Protecting the Ozone Layer: Final Report of the Technology Review Panel M3 - Communication or other resource ER -