In 2013, I made a DIY purifier to get through an apocalyptic Beijing winter. The DIY wasn’t pretty, but it worked. Hundreds of days of tests showed it cut tiny 0.5 micron particles in my bedroom by an average of 84% (1, 2, 3). The DIY proved that air purifiers don’t have to […]
Month: October 2019
Did Delhi’s Air Pollution Drop 25% in 2019? What the Data Says
The Delhi government and Delhi Chief minister Arvind Kejriwal announced Delhi’s PM2.5 air pollution was down 25% in 2016-2018 compared to 2012-2014. Yet there is doubt. Thewire.in, for one, expressed skepticism about this claim. As data-driven nerds, we wanted to let the numbers answer this question. So we dug into the Delhi PM2.5 data […]
How Effective Are Kid’s Masks at Filtering Air Pollution?
As cities like Delhi, Beijing and Manila face toxic levels of air pollution, people are rushing to find effective pollution masks, particularly kid’s masks. But there’s a problem. Children’s faces are different from adults’. Add to that, children are constantly growing, meaning that the mask that fit last year might not fit this year. Kid’s […]
Three Reasons We Were Able to Make a Better Air Purifier
If you’ve heard about The Sqair, you should be suspicious. The Sqair puts out more clean air for less money AND it’s quieter AND more energy efficient? Either I’m lying, or there’s some logical reason how this is possible. There are three. 1. It helps my life become a little dumber I’ve got enough apps […]
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