# Indicator 74. Consumption of ozone-depleting substances (MDG Indicator)

## Rationale and definition:

This indicator measures the consumption trends for ozone-depleting substances (ODS) controlled under the Montreal Protocol on Substances that Deplete the Ozone Layer, thereby allowing inference of the amounts of ODS being eliminated as a result of the protocol. It is expressed in ODP Tons, which is defined as the Metric Tons of ODSs weighted by their Ozone Depletion Potential (ODP).1

The Montreal and the Vienna Convention for the Protection of the Ozone Layer target the complete phase-out of use of ODS.

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