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GLOBAL WARMING (2) |
HYDROCHLOROFLUOROCARBONS (2) |
HYDROFLUOROCARBONS (2) |
OZONE (2) |
OZONE LAYER (2) |
OZONE-DEPLETING SUBSTANCES (2) |
REFRIGERATION (2) |
GLOBAL WARMING (2) |
HYDROCHLOROFLUOROCARBONS (2) |
HYDROFLUOROCARBONS (2) |
OZONE (2) |
OZONE LAYER (2) |
OZONE-DEPLETING SUBSTANCES (2) |
REFRIGERATION (2) |