ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Pollution levels in Beijing climbed to dangerous heights on Thursday (March 27), causing residents to worry about their health.<br/> <br />Beijing's official air quality index (AQI), which measures airborne pollutants including particulate matter and sulphur dioxide, peaked to readings of over 400 on Thursday.<br/> <br />A level of 300 is considered dangerous while the World Health Organisation recommends a daily level of no more than 20.<br/> <br />Beijing's index routinely exceeds 300, and sometimes hits levels above 500.<br/> <br />Many Beijing residents took to wearing face masks as pollution levels peaked in the afternoon.<br/> <br />Chinese regulators told the country's two largest insurers to stop selling policies against smog, a week after such policies were launched, the state-run English newspaper the China Daily reported on Thursday.<br/> <br />The newspaper did not say why the country's insurance watchdog had ordered People's Insurance Company of China (PIC
