When I first started making DIY purifiers, the only air quality monitors I could buy were a US$260 Dylos or crazily expensive particle counters that costed thousands of dollars. Since then, the market has exploded with new particle counters as cheap as US$15. But are they any good? …
This post contains supplemental data for the post “Can I Clean or Wash HEPA filters?“. It includes detailed information about the testing method, and the original data, open-sourced for all to view. Click here to view the original article Open Data Particle Capture Tests For the particle capture tests, CK …
Four years ago, I was coughing through a Beijing winter and wanted some clean air. But all the purifiers I could find cost hundreds of dollars, so I strapped a filter to a fan I had at home and made my first DIY purifier. It wasn’t pretty, but I tested …
Another year, another winter. As winter arrives in Beijing and soon in Shanghai, I got to wondering: how much worse is winter air in Beijing? To get to the bottom of it, I analyzed the last eight years of US Embassy PM2.5 data for Beijing and Shanghai. I found that …
Map of today’s pollution levels across China – 9th September 2016. Source：http://aqicn.org What a glorious day in Beijing! Right now, the US Embassy in Beijing is giving a PM2.5 value of 0. Is summer normally this good? And what’s the pollution like in other parts of China right now? (Short answer: …
BBC Horizons attends one of our workshops in Beijing as part of their series on Pollution Solutions See the full episode at BBC Horizons.
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