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View of vehicles on a busy expressway shrouded in smog in Beijing, China, 30 November 2015. Beijing issued an orange alert for heavy smog 30 November, the highest level this year. Authorities in the Chinese capital warned of 'severe pollution' and advised the capital's 20 million inhabitants to stay indoors. (Photo by How Hwee Young/EPA)

View of vehicles on a busy expressway shrouded in smog in Beijing, China, 30 November 2015. Beijing issued an orange alert for heavy smog 30 November, the highest level this year. Authorities in the Chinese capital warned of 'severe pollution' and advised the capital's 20 million inhabitants to stay indoors. (Photo by How Hwee Young/EPA)



A man wearing a mask rides his electric bicycle along a street on a smoggy day in Zhengzhou, Henan province, China, November 30, 2015. Heavy smog and thick fog engulfed many parts of northern and eastern China on Monday, local media reported. (Photo by Reuters/Stringer)

A man wearing a mask rides his electric bicycle along a street on a smoggy day in Zhengzhou, Henan province, China, November 30, 2015. Heavy smog and thick fog engulfed many parts of northern and eastern China on Monday, local media reported. (Photo by Reuters/Stringer)



A man uses his mobile phone to take pictures of the financial area of Pudong New District (rear) on a smoggy day in Shanghai, China, November 30, 2015. (Photo by Reuters/Stringer)

A man uses his mobile phone to take pictures of the financial area of Pudong New District (rear) on a smoggy day in Shanghai, China, November 30, 2015. (Photo by Reuters/Stringer)



Pedestrians walk along a street in front of the city's landmark Jiangsu Nanjing Broadcast Television Tower amid thick haze in Nanjing, Jiangsu province, China, November 30, 2015. Heavy smog and thick fog engulfed many parts of northern and eastern China on Monday, local media reported. (Photo by Reuters/Stringer)

Pedestrians walk along a street in front of the city's landmark Jiangsu Nanjing Broadcast Television Tower amid thick haze in Nanjing, Jiangsu province, China, November 30, 2015. Heavy smog and thick fog engulfed many parts of northern and eastern China on Monday, local media reported. (Photo by Reuters/Stringer)



A man rides his bicycle across a street amid heavy haze in Fuyang, Anhui province, China, November 30, 2015. (Photo by Reuters/Stringer)

A man rides his bicycle across a street amid heavy haze in Fuyang, Anhui province, China, November 30, 2015. (Photo by Reuters/Stringer)



Boats pass along the Huangpu River next to the financial area of the Pudong New District (L) amid heavy smog in Shanghai, China, November 30, 2015. (Photo by Reuters/Stringer)

Boats pass along the Huangpu River next to the financial area of the Pudong New District (L) amid heavy smog in Shanghai, China, November 30, 2015. (Photo by Reuters/Stringer)



Pedestrians and policeman cross the street at a crosswalk at the Tiananmen Square during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

Pedestrians and policeman cross the street at a crosswalk at the Tiananmen Square during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A man wearing a mask makes his way at a business district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A man wearing a mask makes his way at a business district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A man wearing a mask walks past the China Central Television (CCTV) building during a heavily polluted day in Beijing, November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A man wearing a mask walks past the China Central Television (CCTV) building during a heavily polluted day in Beijing, November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



Paramilitary soldiers walk past the Zhengyangmen gate as they patrol at the Tiananmen Square during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

Paramilitary soldiers walk past the Zhengyangmen gate as they patrol at the Tiananmen Square during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A woman covers her mouth with her hair amid heavy smog in Beijing, China, November 30, 2015. (Photo by Jason Lee/Reuters)

A woman covers her mouth with her hair amid heavy smog in Beijing, China, November 30, 2015. (Photo by Jason Lee/Reuters)



Vehicles drive past buildings amid heavy smog in Beijing's Guomao area, China, November 30, 2015. (Photo by Jason Lee/Reuters)

Vehicles drive past buildings amid heavy smog in Beijing's Guomao area, China, November 30, 2015. (Photo by Jason Lee/Reuters)



A man wearing a mask makes his way at a financial district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A man wearing a mask makes his way at a financial district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A woman covers her mouth and nose with her muffler as she makes her way at a financial district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A woman covers her mouth and nose with her muffler as she makes her way at a financial district during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A man wearing a mask stands in front of the giant portrait of China's late Chairman Mao Zedong at the Tiananmen Gate during a heavily polluted day in Beijing, November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A man wearing a mask stands in front of the giant portrait of China's late Chairman Mao Zedong at the Tiananmen Gate during a heavily polluted day in Beijing, November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



Pedestrians wearing masks make their way during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)

Pedestrians wearing masks make their way during a heavily polluted day in Beijing, China November 30, 2015. (Photo by Kim Kyung-Hoon/Reuters)



A woman wearing a mask cycles amid heavy smog in Beijing's Guomao area, China, November 30, 2015. (Photo by Jason Lee/Reuters)

A woman wearing a mask cycles amid heavy smog in Beijing's Guomao area, China, November 30, 2015. (Photo by Jason Lee/Reuters)



A woman wears a mask on a pedestrian overpass on a hazy day at the Pudong financial area in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)

A woman wears a mask on a pedestrian overpass on a hazy day at the Pudong financial area in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)



A woman sells hot food to a driver stranded on a highway between Beijing and Hebei province, China, that is closed due to smog on an extremely polluted day November 30, 2015. (Photo by Damir Sagolj/Reuters)

A woman sells hot food to a driver stranded on a highway between Beijing and Hebei province, China, that is closed due to smog on an extremely polluted day November 30, 2015. (Photo by Damir Sagolj/Reuters)



Women stand on a pedestrian overpass in front of residential buildings during a hazy day at the Pudong financial area in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)

Women stand on a pedestrian overpass in front of residential buildings during a hazy day at the Pudong financial area in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)



People talk behind a toll gate on a highway between Beijing and Hebei province, China that is closed due to smog on an extremely polluted day, November 30, 2015. (Photo by Damir Sagolj/Reuters)

People talk behind a toll gate on a highway between Beijing and Hebei province, China that is closed due to smog on an extremely polluted day, November 30, 2015. (Photo by Damir Sagolj/Reuters)



A woman cleans a glass panel on a residential building during a hazy day in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)

A woman cleans a glass panel on a residential building during a hazy day in Shanghai, China, November 30, 2015. (Photo by Aly Song/Reuters)



A driver wears a mask between vehicles stranded on a highway between Beijing and Hebei province, China, that is closed due to smog on an extremely polluted day November 30, 2015. (Photo by Damir Sagolj/Reuters)

A driver wears a mask between vehicles stranded on a highway between Beijing and Hebei province, China, that is closed due to smog on an extremely polluted day November 30, 2015. (Photo by Damir Sagolj/Reuters)



A man plays with a kite on an extremely polluted day in Baoding, China November 30, 2015. Baoding, located in Hebei province neighbouring Beijing was the most polluted city in China in the first half of 2015, according to the country's Ministry of Environmental Protection. (Photo by Damir Sagolj/Reuters)

A man plays with a kite on an extremely polluted day in Baoding, China November 30, 2015. Baoding, located in Hebei province neighbouring Beijing was the most polluted city in China in the first half of 2015, according to the country's Ministry of Environmental Protection. (Photo by Damir Sagolj/Reuters)



A woman fixes a protective mask on a baby during an extremely polluted day in Baoding, China November 30, 2015. (Photo by Damir Sagolj/Reuters)

A woman fixes a protective mask on a baby during an extremely polluted day in Baoding, China November 30, 2015. (Photo by Damir Sagolj/Reuters)



Women wear protective masks on an extremely polluted day in Baoding, China November 30, 2015. (Photo by Damir Sagolj/Reuters)

Women wear protective masks on an extremely polluted day in Baoding, China November 30, 2015. (Photo by Damir Sagolj/Reuters)



A woman wearing a mask walk in a street in a Yonghegong Lama temple compound seen shrouded in smog in Beijing, China, 30 November 2015. Beijing issued an orange alert for heavy smog 30 November, the highest level this year. Authorities in the Chinese capital warned of 'severe pollution' and advised the capital's 20 million inhabitants to stay indoors. (Photo by How Hwee Young/EPA)

A woman wearing a mask walk in a street in a Yonghegong Lama temple compound seen shrouded in smog in Beijing, China, 30 November 2015. Beijing issued an orange alert for heavy smog 30 November, the highest level this year. Authorities in the Chinese capital warned of 'severe pollution' and advised the capital's 20 million inhabitants to stay indoors. (Photo by How Hwee Young/EPA)
02 Dec 2015 08:01:00