For this month's Environmental Outlook: China is said to be literally choking on its own success. The World Health Organization says an Air Quality Index rating above 300 is hazardous. The U.S. Embassy in Beijing has a pollution monitor that shows the city regularly exceeds 500. By comparison, the air quality index in Los Angeles is typically in the 20s. Chinese factories operate 24/7 and the prevalence of automobiles has skyrocketed. The worsening pollution impelled the Chinese government to issue an emergency warning about the air in Beijing for the first time. But much more needs to be done. Diane and her guests discuss the air pollution crisis in China.