Dense smog engulfed the Chinese capital, Beijing and a large swathe of northern and eastern China for a fifth day in a row. Data from the US embassy put levels of PM2.5 particles at 405 in the capital as of 1 pm local time. PM 2.5 refers to particles measuring less than 2.5 micrometres across and is the most noxious form of air pollution.<br /><br />The U.S. Environmental Protection Agency considers levels above 300 to be hazardous.<br />No Comment | euronews: watch the international news without commentary | http://www.euronews.net/nocomment/
