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Titolo: Chinese girls wear face masks to protect

Descrizione: Chinese girls wear face masks to protect against pollution on the streets of Beijing on December 7, 2011. Millions of Chinese have gone online to vent their anger over the thick smog that has blanketed Beijing in recent days, raising health fears and causing hundreds of flights to be cancelled. Sales of face masks were reported to have surged as residents of China's heavily polluted capital sought to protect themselves from the air, which US embassy figures ranked as "very unhealthy". AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

Crediti immagine: AFP/Getty Images - © 2011 AFP

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