NewbieV points out coverage of the effort to assess Beijing's air pollution control efforts. Quote from one of the investigators: "This will be a very interesting experiment that can never happen again." Here's the main project scientist's site on the monitoring effort, and Newsweek coverage that brings out a paradoxical effect of reducing pollution on global warming. "Unmanned aerial vehicles are measuring emissions of soot and other forms of black carbon. The instruments are observing pollution transport patterns as Beijing enacts its 'great shutdown' for the Summer Olympic Games. Chinese officials have compelled reductions in industrial activity by as much as 30 percent and cuts in automobile use by half to safeguard the health of competing athletes immediately before and during the games."