Industry-certified particle masks are most effective at protecting people from volcanic ash, whilst commonly used surgical masks offer less protection.
Ash and cinders spewed Saturday from the Colima Volcano in western Mexico, prompting authorities to close the airport in the state capital of Colima and order the evacuation of a half dozen hamlets on the flanks of the peak.
Singapore's smog problem from forest fires in Indonesia worsened Wednesday as air pollutant levels reached a 16-year high.
A local government in southwestern Japan on Tuesday advised residents to stay indoors or wear masks when they go outside in the nation's first official health warning over smog drifting in from China.
(PhysOrg.com) -- As the global nanotechnology industry continues to produce cutting-edge consumer products, the scientific community is leaving a key part of the U.S. public behind when sharing knowledge of this new field ...