HCFCs, methyl bromide to dominate ozone layer meeting

Bans on all but "essential" new uses of chlorofluorocarbons (CFCs) and halons in the industrialised world by the end of 1995 seem certain to be agreed at a review of the global Montreal Protocol on protection of the ozone layer in November. But hard negotiations are likely over phase-out schedules for one group of CFC substitutes, the HCFCs, and the fumigant methyl bromide.

The Protocol will be reviewed at an international meeting in Copenhagen which ends on 26 November. Like its predecessors, this will take place against a background of alarming new evidence about the threat posed to the ozone layer by emissions of halocarbons.

Last year's record ozone depletion above the Antarctic, which appears to have been catalysed by dust particles from volcanic eruptions in Chile and the Philippines, has already been

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