"China Says Only It Has Right To Monitor Air Pollution"
"A senior Chinese official demanded on Tuesday that foreign embassies stop issuing air pollution readings, saying it was against the law and diplomatic conventions, in pointed criticism of a closely watched U.S. embassy index."
"The level of air pollution in China's heaving capital varies, depending on the wind, but a cocktail of smokestack emissions, vehicle exhaust, dust and aerosols often blankets the city in a pungent, beige shroud for days on end.
Many residents dismiss the common official readings of "slight" pollution in Beijing as grossly under-stated.
The U.S. embassy has installed a monitoring point on its roof which releases hourly air-quality data via a widely followed Twitter feed. The U.S. consulates in Shanghai and the southern city of Guangzhou provide a similar service."Source: Reuters, 06/06/2012