In September 1987, 24 nations signed an agreement in Montreal, Canada, to limit the production of CFC's.

1987年9月，24个国家在加拿大的蒙特利尔签署了一个协议，以限制氯氟化碳的生产。

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The announcement follows the release of a report last month by Dutch and American scientists arguing that the voluntary Montreal agreement has been more successful in combating climate change than has the market-based Kyoto protocol.

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The Montreal Protocol is the international agreement designed to protect the ozone layer by phasing out production of Cfc's and halons.

BBC: News | Sci/Tech | Ozone hole reaches record size

Mr Harper was due to welcome European leaders to Montreal on October 17th to launch talks on a trade agreement with the European Union.

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