RT null T1 Technical Progress on Protecting the Ozone Layer: Final Report of the Technology Review Panel A1 United Nations Environment Programme, K1 ozone-depleting substance K1 ozone layer K1 global warming K1 carbon tetrachloride K1 toxic substance K1 chemical K1 air-conditioning K1 heat pump SN 92 807 1247 0 YR 1989 FD 1989-08 LK https://wedocs.unep.org/handle/20.500.11822/29860 UL https://wedocs.unep.org/handle/20.500.11822/29860 NO This is a summary of the assessment prepared by the Technology Review Panel based primarily on input from international expert committees called "Technical Options Committees", on reports provided directly to the Panel, and on presentations to the Panel. This assessment provides a comprehensive update on the technical progress being made throughout the world to reduce our dependency on ozone depleting substances. Progress is documented by a description of the technical options currently available in each major use sector. DS UN Environment Document Repository RD Sep 19, 2026