China - The Chinese government is now demanding foreign embassies quit publishing their own air quality reports on the country's air.
Chinese officials say only their government is permitted to monitor and publish air quality information; reportedly because data from other sources may not be as rigorous.
But many point to this recent development as an escalation in an on-going feud over the U.S. Embassy's highly popular Twitter feed tracking the pollution levels in Beijing.
The feed has long been a source of contention between the governments of the two countries and has 19,000 followers.
The U.S. consulates in Shanghai and Guangzhou also post readings of those cities air quality on Twitter.
All three feeds were operating as usual today.