of residential (and many restaurants ) usage in Beijing.
approximately 321,000 underfired charbroilers in approximately 700,000 U.S. food service operations account for 94 percent of current restaurant emissions,
equivalent to
particulate matter (PM) =/= PM2.5
当然，这个数据的好处是他们有可以把街头小烧烤摊拿出来晒。但是现在北京有么？