"The number of smokers has barely dropped over the years in Beijing, and passive smoking remains a public health issue," he said.
"The prevalence of lung cancer in the area right now is a reflection of the prevalence of smoking 20 years ago," said Yang Gonghuan, deputy director of the nongovernmental China Association on Tobacco Control, suggesting that a number of lung cancer patients this year were exposed to tobacco on a regular basis 20 years ago.
Yang Jie, deputy director of the Chinese Center for Disease Control and Prevention's tobacco control office, agreed.
"It's the result of accumulation. The number of smokers and those who are exposed to secondhand smoke has been so huge since the 1980s that it began to take effect now by lifting the prevalence of lung cancer year by year," he said. "If we start stricter tobacco control right now, we may see the incidence rate drop 20 years later."
To deal with the disease, the capital is working on several projects
Cold air front to sweep China's northern regions