China Tells U.S. to Stop Reporting China's Bad Air

China told foreign embassies Tuesday to stop publishing their own reports on air quality in the country, escalating its objections to a popular U.S. Embassy Twitter feed that tracks pollution in smoggy Beijing. Only the Chinese government is authorized to monitor and publish air quality information and data from other sources may not be standardized or rigorous, Wu Xiaoqing, a vice environmental minister, told reporters.