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Le concentrazioni di gas serra nell’atmosfera hanno raggiunto i più alti livelli degli ultimi 800'000 anni. Lo dicono gli esperti del clima in un rapporto pubblicato oggi, domenica, a Copenhagen. La temperatura media della superficie terrestre e degli oceani è aumentata di 0,85 gradi fra il 1880 e il 2012.
Nel testo si può leggere che "resta poco tempo" per riuscire a mantenere l’innalzamento sotto la soglia dei 2 gradi.
Il Gruppo intergovernativo delle Nazioni Unite (IPCC) afferma che le emissioni mondiali devono quindi essere ridotte del 40 al 70% entro il 2050 e scomparire entro il 2100.
ATS/AlesS
Dal TG20:
RG 18.30 del 2.11.2014 Il servizio di Chiara Savi
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