Though China’s air quality, particularly that of Beijing, attracts global headlines, such problems are not unique to China in historical terms. Los Angeles, the second largest city in the United States, has battled pollution for more than 50 years.

A window on today's China for Southeast Asia
Though China’s air quality, particularly that of Beijing, attracts global headlines, such problems are not unique to China in historical terms. Los Angeles, the second largest city in the United States, has battled pollution for more than 50 years.