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 PM 2.5 data for Beijing and Shanghai. I found that the capital’s air has […]
Author: Paddy Robertson
How accurate are common particle counters?
When I started Smart Air in 2013, I wanted to buy a particle counter, and I had basically two options. I could buy a US$260 Dylos or spend thousands of dollars on the crazy expensive particle counters. Since then, the market has exploded with new air quality monitors as cheap as 99 RMB. But are they […]
US Embassy Beijing reads AQI of 0! Are the summer skies always clear?
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: not good! Long answer: read […]