Cans of air for sale in China

After talking about clean air days in class, I ran across these interesting articles on the sale of cans of "fresh air" in China: 

http://www.brisbanetimes.com.au/world/canned-air-for-sale-in-china-as-blanket-of-smog-returns-20130129-2dht3.html

http://news.yahoo.com/blogs/sideshow/cans-fresh-air-sale-china-234302171.html

Hope you all have a great weekend,
Daniela