Published 22nd November 2009 - 3 comments - 1539 views -
There's an air-quality monitoring station on the roof of the US Embassy in Beijing, which continuously measures PM2.5 particle pollution (the concentration of particles less than 2.5 micrometers in diameter in the air). The station sends out a tweet every hour with the data along with an assessment of overall air quality as a one-word summary. And the quality of the air in Beijing? It ranges from Unhealthy to Very Unhealthy to Hazardous. Here's the latest data. Not very good at all, I'm afraid. But it's a brilliant use of Twitter, isn't it?
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