Louvre in Paris, France.

Paříž a osud Země

PRINCETON – Až se koncem měsíce na Konferenci OSN o změně klimatu v Paříži sejdou světoví lídři a vládní vyjednavači, budou v sázce životy miliard lidí v nadcházejících staletích. Na vážkách je i osud neznámého počtu ohrožených druhů rostlin a živočichů.

Roku 1992 na „Summitu Země“ v Rio de Janeiru podepsalo 189 zemí, včetně USA, Číny, Indie a všech evropských států, Rámcovou úmluvu OSN o změně klimatu (UNFCCC), čímž souhlasily se stabilizací skleníkových plynů „na dostatečně nízké úrovni, která zamezí nebezpečnému antropogennímu zásahu do klimatické soustavy.“

Doposud však k takové stabilizaci nedošlo a bez ní by zpětné klimatické vazby mohly vzestup teplot dál zrychlit. Když sluneční záření odráží méně arktického ledu, oceány absorbují víc tepla. Tající sibiřský permafrost uvolní obrovské objemy metanu. Neobyvatelnými by se tak mohly stát rozsáhlé oblasti naší planety, které jsou dnes domovem miliard lidí.

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