Recent Air Pollution Articles:

The Really Small Stuff

To test how effective the DIY filter is, I’ve been posting lots of data on 2.5 micron particles. But my particle counter also measures smaller 0.5 micron particles, and I’ve been looking closely at that lately.     Remember that the “PM2.5” you hear in the news is different from the numbers on most particle counters. […]

Read More »

PM2.5 Particle Size Virus

Filters and Fetuses

I don’t meant to be sensational, but I just got a picture from a friend of a friend who is pregnant and just started using the DIY filter three days ago. The filter is turning black already. After all, scientific research suggests children are the most affected by air pollution. If the outrageous prices of filters are keeping pregnant women […]

Read More »