EcoWatch: Today on American Public Medias Marketplace Morning, Rob Schmitz reports on the dangerous air pollution levels that hit Beijing over the weekend. According to the report, Beijings air pollution went off the charts. The pollution was about 40 times more than the limit set by the World Health Organization. One of Beijings biggest hospitals, Peking University Hospital, reported treating twice as many heart attacks over the weekend. The Beijing childrens hospital said a third of its outpatient visits...