UNEP 2006 Report of the Rigid and Flexible Foams Technical Options Committee - United Nations - Google Books

https://books.google.de/books?id=NO1OAQAAMAAJ&pg=PA24#v=onepage

The Montreal Protocol on Substances that Deplete the Ozone Layer was designed so that the phase out schedules could be revised on the basis of periodic scientific and technological assessments. Since the 2002 Assessment of the Technology and Economic…