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Aproape un an intreg le este necesar gazelor generate in emisfera nordica puternic industrializata a Pamantului ca sa tranziteze zona mediana a planetei si sa ajunga in emisfera sudica. De vreme ce pe parcursul anului trecut gazele cu efect de sera din toata lumea si-au sporit simultan nivelul, este probabil ca acest lucru sa fie parte a unui ciclu natural si nu rezultatul direct al activitatilor umane. Mai multe milioane de tone de gaz metan nou sunt prezente in atmosfera, ca urmare a acestei modificari subite de nivel. Metanul reprezinta a cincisprezecea parte din totalul de gaze cu efect de seara, dar efectul sau este de 25 de ori mai puternic decat cel al dioxidului de carbon. Cercetatorii pregatesc studii mai aprofundate ale chestiunii, insa datele ne arata ca stiinta se afla abia la inceputul intelegerii reale a fenomenului incalzirii globale, iar oamenii s-ar putea sa fie mai putin vinovati de aceasta manifestare decat se crede in prezent.
Sursa: Daily Galaxy
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