Rationale - what it means and why it is an important measure
Depletion of the stratospheric ozone layer caused by man-made chemicals leads to increases in UV-B radiation. The largest contribution to ozone depletion comes from CFCs, carbone tetrachlorite and methyl chloroform.
How it is compiled, what data are needed
The emissions should be measured in ODP tonnes, i.e. Metric Tonnes x Ozone Depletion Potential. The indicator should be measured annually.
Measurements and units
Emissions of ozone-depleting substances (in ODP)
Possible temporal and spatial format
Reference to methodology resources
EEA, 1999. Environment in the European Union at the Turn of the Century. Copenhagen.
To reduce emissions of ozone-depleting substances with respect to targets.
Targets, benchmarks, reference values
Vienna Convention for the Protection of Ozone Layer, and the affiliated Montreal Protocol on Substances that Deplete the Ozone Layer, establish limits for reduction of ozone-depleting substances (ODS). There are several amendments to the Montreal Protocol for limiting the use of ODS. Stipulating the worldwide termination of the production and use of CFCs and halons by the year 2000, the Protocol dictates that the target for these substances should be zero.
References to examples of application
Ozone-depletion substances in Europe: http://themes.eea.eu.int/toc.php/issues/ozone?doc=39045&l=en