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Surgical Masks–Not Just for the E.R.

Particulate levels in Beijing broke records last weekend, when the Municipal Environmental Monitoring Center recorded levels of PM2.5 that Reuters said may have reached 900 micrograms per square meter–more than 30 times what the World Health Organisation considers a safe daily level....

Beijing at sunrise.

Particulate levels in Beijing broke records last weekend, when the Municipal Environmental Monitoring Center recorded levels of PM2.5 that Reuters said may have reached 900 micrograms per square meter–more than 30 times what the World Health Organisation considers a safe daily level.

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