Beijing issues 2nd smog red alert of the month
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China's capital Beijing issued its second smog red alert of the month on Friday, triggering vehicle restrictions and forcing schools to close.
A wave of smog is due to settle over the city of 22.5 million from Saturday to Tuesday. Levels of PM2.5, the smallest and deadliest airborne particles, are set to top 500, according to the official Beijing government website. Smog red alerts are triggered when levels of PM2.5 above 300 are forecast to last for more than 72 hours.
