When you look at that graph, and, indeed, today's, you'll notice that the peak moments coincide with low wind speeds. Winds are very strong in spring afternoons and I believe they blow a lot of the pollution away. When the wind dies down at night, the air fills up with pollution again. From diesel trucks, certainly, but construction, too. And agricultural stalk burning.
What puzzles me is that the humidity, which reaches 100% at night, doesn't precipitate the pollution. I thought it should?
Anyway, high AQI rates are common for Kunming in spring. But that doesn't mean it isn't utterly disgusting. We should all be aware that we're slowly being killed here.
Jurassic eggs reveal insights into dinosaur development
发布者is it...blowing itself?
Rhinos reintroduced to Yunnan
发布者I hear Prince William doesn't want to live in a world without rhinos. Yes: now.msn.com/[...]
Getting Away: Cycling around Dianchi
发布者I can confirm what AlexKMG says, and it seems particularly true for third-tier cities in Honghe Prefecture, such as Kaiyuan or Gejiu. In Gejiu I was told only two hotels (except for the bunch around the bus station) accept foreigners, and they're not on the cheap side.
An end to hand, foot and mouth disease?
发布者Now do AIDS!
Videos: Clique and Gangnam Style by The Dangsters
发布者superb cameo by 小刚!