Pollution was one of the issues vigorously discussed in the run up to and during the 2008 Olympics in Beijing. Well, according to a survey done by researchers as NASA’s Goddard Space Flight Center:
During the two months when restrictions were in place, the levels of nitrogen dioxide (NO2) — a noxious gas resulting from fossil fuel combustion (primarily in cars, trucks, and power plants) — plunged nearly 50 percent. Likewise, levels of carbon monoxide (CO) fell about 20 percent.
Now, drawing attention to the graphics released with the report, it appears that there was a marked increase in NO2 concentrations outside of Shanghai as well:
Hat tip: James Fallows