This metric is intended to capture the amount of emissions from substances listed in the Montreal Protocol on Substances that Deplete the Ozone Layer.
List of products containing ozone-depleting substances include:
Automobile and truck air conditioning units (whether incorporated in vehicles or not)
Domestic and commercial refrigeration and air conditioning/heat pump equipment
Refrigerators
Freezers
Dehumidifiers
Water coolers
Ice machines
Air conditioning and heat pump units
Aerosol products, except medical aerosols
Portable fire extinguishers
Insulation boards, panels and pipe covers
Pre-polymers
A full list of ozone-depleting substances can be found here: https://ozone.unep.org/treaties/montreal-protocol/articles/annex-controlled-substances
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