Tag: PM 2.5

  • Now you can compare Beijing PM 2.5 air quality readings on your phone

    It just so happens that today is not one of the more beautiful days in Beijing. After a week of generally glorious fall weather, with exceedingly clear air (except once or twice), the national holiday is over and whatever process churns up the smog has resumed. I’m not complaining. I haven’t been here long enough […]