Proč snižování uhlíkových emisí nestačí

Dateline – Před dvaceti lety přijaly vlády Montrealský protokol, úmluvu chránící ozonovou vrstvu Země před emisemi škodlivých látek. Jen málokdo tehdy předvídal, jak dalekosáhlé toto rozhodnutí nakonec bude.

Protokol se konkrétně zaměřil na eliminaci látek, jako jsou chlor-fluorované uhlovodíky (CFC nebo také freony) obsažené v některých výrobcích – v ledničkách, pěnách či sprejích na vlasy –, ve snaze obnovit tenkou plynnou slupku, která filtruje škodlivé ultrafialové sluneční paprsky. Do roku 2010 bude po celém světě eliminováno bezmála 100 látek poškozujících ozonovou vrstvu, včetně freonů.

Nebýt rozhodnutí přijatého před 20 lety, zvýšila by se v atmosféře koncentrace látek poškozujících ozonovou vrstvu do roku 2050 desetinásobně. To by mohlo zvýšit počet případů rakoviny kůže až o 20 milionů a počet případů šedého očního zákalu až o 130 milionů, nemluvě o škodách na imunitní soustavě lidí, na přírodě a na zemědělství.

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