The conclusion in 1985 of the Vienna Convention for the Protection of the Ozone Layer, followed in 1987 by the Montreal Protocol on Substances that Deplete the Ozone Layer, were the starting points of global cooperation for the protection of the Earth’s stratospheric ozone layer. The six meetings held by the Parties to the Vienna Convention, and the fourteen meetings held by the Parties to the Montreal Protocol, since then have led to many decisions designed to implement the objectives of the Convention and Protocol, all of which are reflected in this Handbook for the International Treaties for the Protection of the Ozone Layer.
The complete 2001 edition of the handbook for the Vienna Convention for the Protection of the Ozone Layer.
The Montreal Protocol on Substances that Deplete the Ozone Layer establishes the phase-out schedules for production and consumption of the most harmful ozone depleting substances (ODS). Different phase-out schedules apply to the industrialised and developing countries (Section 5.1). The ODS phase-out is in different stages of implementation across the globe. Eventually, production and consumption of ODS need to be phased out globally. Only then will the ozone layer be able to recover.
The present assessment deals with the results of previously undertaken investigations. These repeatedly give reasons for concern for potential effects, but relatively little progress has been made in quantifying these effects. The more the investigators look into the problems, the more the complexity becomes apparent. Nevertheless, the knowledge is accumulating