RT null
T1 2020 World Ozone Day letter to National Ozone Officers
A2 Curlin, James S.
K1 ozone layer
K1 ozone-depleting substance
K1 hydrochlorofluorocarbon
K1 energy efficiency
K1 air-conditioning
K1 refrigeration
PB United Nations Environment Programme
YR 2020
FD 2020-09
LK https://wedocs.unep.org/handle/20.500.11822/33834
UL https://wedocs.unep.org/handle/20.500.11822/33834
NO Letter to National Ozone Officer in commemoration of World Ozone Day for the preservation of the Ozone Layer
DS UN Environment Document Repository
RD Sep 17, 2026