Smoggy Beijing sees lung cancer cases soar

The number of lung cancer cases in the Chinese capital Beijing has soared over the last decade.

Beijing health officials say smoking is still the number one cause of lung cancer, but they admit air pollution is also a factor.

Correspondents say Chinese people are becoming increasingly worried about the health problems caused by the thick air pollution that often blankets much of their country, a result of rapid economic expansion coupled with poorly enforced laws designed to protect the environment.