La nube tóxica de China

FUZ03. HARBIN (CHINA), 21/10/2013.- Un policía de tránsito trabaja entre una densa nube de esmog en Harbin, en la provincia de Heilongjiang (China) hoy, lunes 21 de octubre de 2013. Una fuerte capa de esmog envolvió hoy el noreste del país, causando interrupciones en el tráfico. EFE/Hao Bin/PROHIBIDO SU USO EN CHINA

Passerbys cycle past a truck waiting outside a closed toll booth as heavy smog spreads on a highway as vehicles are forced to wait due to heavy smog in Jilin, northeast China's Jilin province on October 22, 2013. Thick smog enveloped China's northeast area for a third day on October 22, with schools and regional airports shuttered and low visibility forcing ground transport to a halt in places. CHINA OUT AFP PHOTO

Buildings and streets are seen under heavy smog in Harbin, northeast China's Heilongjiang province on October 22, 2013. Thick smog enveloped a major Chinese city for a third day on October 22, with schools and a regional airport shut and poor visibility forcing ground transport to a halt in places. CHINA OUT AFP PHOTO

SH01 SHENYANG (CHINA) 22/10/2013.- Peatones circulan por las calles contaminadas de Shenyang en China hoy, martes 22 de octubre de 2013. La fuerte contaminación que desde el domingo envuelve el noreste de China, en las zonas fronterizas con Rusia y Corea del Norte, ha obligado a cerrar escuelas, autopistas y aeropuertos en grandes ciudades de la región como Harbin y Changchun, informaron los medios oficiales. EFE/Wu Hong

A woman walks with her child on a street as schools were closed due to the heavy smog in Jilin, northeast China's Jilin province on October 22, 2013. Thick smog enveloped China's northeast area for a third day on October 22. CHINA OUT AFP PHOTO

A man pushes his bike onto a bridge under heavy smog in Harbin, northeast China's Heilongjiang province, on October 21, 2013. Choking clouds of pollution blanketed Harbin, which is famed for its annual ice festival, reports said, cutting visibility to 10 metres (33 feet) and underscoring the nation's environmental challenges. CHINA OUT AFP PHOTO

A man stands next to an airplane under heavy smog in Harbin, northeast China's Heilongjiang province, on October 21, 2013. Choking clouds of pollution blanketed Harbin, which is famed for its annual ice festival, reports said, cutting visibility to 10 metres (33 feet) and underscoring the nation's environmental challenges. CHINA OUT AFP PHOTO

A woman wearing a mask uses her mobile phone in the smog in Harbin, northeast China's Heilongjiang province, on October 21, 2013. Choking clouds of pollution blanketed Harbin, which is famed for its annual ice festival, reports said, cutting visibility to 10 metres (33 feet) and underscoring the nation's environmental challenges. CHINA OUT AFP PHOTO

Streets and cars are seen under heavy smog in Harbin, northeast China's Heilongjiang province, on October 21, 2013. Choking clouds of pollution blanketed Harbin, which is famed for its annual ice festival, reports said, cutting visibility to 10 metres (33 feet) and underscoring the nation's environmental challenges. CHINA OUT AFP PHOTO