Cum ar fi Oceanul Arctic fara gheata, iar Pamantul fara Amazon, devastat de uragane de categoria a sasea? Desi toate acestea par scenarii de filme SF, realitatea e ca planeta noastra se afla la o distanta de doar sase grade Celsius de catastrofe de proportii nemaiintalnite. National Geographic difuzeaza diseara, la ora 22.00, un documentar intitulat ‘Sase grade fatale’, despre schimbarile ireversibile produse de incalzirea globala. Daca vom continua sa producem gaze cu efect de sera, iar temperatura medie va continua sa creasca, planeta pe care locuim va deveni de nelocuit.
+ 2 grade C: dispar ghetarii
Ghetarii din Groenlanda s-ar topi intr-un ritm alarmant, iar ursii polari ar fi o specie in pericol de disparitie.
+ 1 grade C: vin tornadele
La o crestere a temperaturii globale cu un grad, mii de case din zona golfului Bengal ar putea fi scufundate, iar tornade si uragane pu-ternice ar incepe sa loveasca Atlanticul de Sud.
+ 4 grafe C: inundatii masive
O temperatura medie anuala mai mare cu 4 grade Celsius ar atrage dupa sine o crestere a nivelului oceanului planetar cu peste un metru. Tari precum Bangladesh si Egipt ar fi devastate, iar orase ca Venetia ar fi total acoperite de ape.
+ 5 grade C: seceta si foamete
Topirea ghetarilor din Himalaya, care alimenteaza Gangele, izvorul vietii pentru mai mult de un miliard de oameni din China, Nepal si India, ar duce la inundatii fara precedent. Apoi, daca ghetarii ar disparea complet, s-ar instala seceta si foametea.
+ 6 grade C: se extind deserturile
Daca vremea ar ajunge sa fie cu sase grade mai calda, lumea ar fi precum cea din perioada cretacica. Oceanele s-ar transforma in mlastini, iar deserturile s-ar extinde cu rapiditate pe continente. In aceste conditii, Pamantul nu va mai putea fi locuit.
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