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      <marc:subfield code="a">Compendium of Canada's engagement in international environmental agreements and instruments. </marc:subfield>
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      <marc:subfield code="a">[Gatineau, Quebec] : </marc:subfield>
      <marc:subfield code="b">Environment and Climate Change Canada = Environnement et changement climatique Canada, </marc:subfield>
      <marc:subfield code="c">2018.</marc:subfield>
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      <marc:subfield code="c">©2018</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Recueil des engagements du Canada aux accords et instruments internationaux sur l'environnement. Protocole de Montréal relatif aux substances qui appauvrissent la couche d’ozone (Protocole à la Convention de Vienne pour la protection de la couche d’ozone).</marc:subfield>
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      <marc:subfield code="a">"Compendium edition: October 2018."</marc:subfield>
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      <marc:subfield code="a">"The Montreal Protocol is the international agreement that ensures the protection of the earth’s ozone layer through the global phase-out of ozone-depleting substances (ODS). All countries that are members of the United Nations have signed on to the Montreal Protocol and all have obligations to gradually eliminate ODS, which are used in refrigeration and air conditioning, foam blowing, aerosols, solvents and other applications"--Plain language summary, page [1].</marc:subfield>
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      <marc:subfield code="a">Vienna Convention for the Protection of the Ozone Layer </marc:subfield>
      <marc:subfield code="d">(1985 March 22). </marc:subfield>
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      <marc:subfield code="t">Recueil des engagements du Canada aux accords et instruments internationaux sur l'environnement. </marc:subfield>
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