"...pay attention to the PM2.5 reading as well. For example, the - TopicsExpress



          

"...pay attention to the PM2.5 reading as well. For example, the PM2.5 concentration went up to about 304 μg/m3 at 4pm yesterday, way past its normal levels of between 20 and 40 μg/m3. The PM2.5 concentration reading measures small particles of less than 2.5 microns in diameter, which can slip past the nasal passages into the lungs and blood streams, potentially creating an entire host of problems from heart attacks to stroke and even brain damage in extreme cases."
Posted on: Sat, 22 Jun 2013 07:08:55 +0000

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