Dear Friends
The air quality of Ulaanbaatar is famously bad because of the ignition of coal stoves. The majority of stoves have been swapped for very much cleaner burning ones and the impact is dramatic. Usually in November the city air has between 500 and 4000 µg of PM2.5 If you visit https://twitter.com/UB_Air you can see Prof Lodoysambas twitter feed which Tweets the number every 3 hours, every alternate day. It has almost reached 600 but that is a far cry from two years ago. There is a (slightly misleading) article from the Guardian at http://www.theguardian.com/world/2013/oct/20/ulan-bator-killer-winter-stoves which discusses the air quality issue. It says the rise in patients with respiratory illnesses from 2004-2008 is deteriorating air but it is far more likely to be the huge increase in population the air was the same from 2004-2008. The population went from 400k to 1.2m in 15 years. Anyway, publicity is not wrong when it comes to cleaner air! Note the feedback from consumers. The photo is of one of the approved new stoves. It is a TLUD with controllable secondary and primary air. Note the very large ring that can be removed to accommodate huge woks. The materials used are cast iron, sheet metal and ceramic. Regards Crispin
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