Birdwatching in the Beijing smog
Beijing has been put on "red alert" due to air pollution levels, so how has it affected the city's people and wildlife? Terry Townshend is an evironmental law consultant and birdwatcher living in the city.
(Picture: Birdwatcher Terry Townshend strikes a lonely figure in the countryside surrounding Beijing. He wears a pollution mask to stop the smog reaching his lungs.)
(Credit: Marie Louise Ng)