Grey outlook
6 Images

Up in the air

Pollution hangs in the air in Beijing, China. (Nelson Ching / Bloomberg)
The Beijing Olympic clock, right, is barely visible as smog engulfs the Great Hall of People in Beijing, China. (Peter Parks / AFP/Getty Images)
The National Stadium, the main venue for the 2008 Olympics, is shrouded in smog in Beijing, China. (Michael Reynolds / EPA)
A cyclist and a bus pass by the high rise buildings shrouded in a haze of smog, in Beijing, China. (Andy Wong / Associated Press)
Delegates arrive for the meeting of the National People’s Congress as smog engulfs Tiananmen Square in Beijing, China. (Peter Parks / AFP/Getty Images)
Traffic clogged roads and thick smog fill the Central Business District (CBD) in Beijing, China. (Adrian Bradshaw / EPA)