Much too visible, according to Astronaut Scott Kelly, who is finishing up his year onboard the International Space Station. On January 12th, Kelly posted the following picture, which shows northern Uttar Pradesh on the left, and the Himalayas and Nepal on the right. In December 2014, NASA released a similar picture highlighting the difference in pollution between […]
Thomas held our first-ever DIY workshops in Ulaan Baatar, Mongolia on September 11-12th. UB residents will soon be breathing winter air pollution that is even worse than Beijing’s. Fortunately now more people are breathing clean air!
Matt Myers attended our workshop in September, and he used it straight through December. On December 7th, he sent me a picture of the blackest HEPA (and pre-filter) I’ve ever seen. Yikes! Time for a new filter! I’d be happy that black gunk is in the filter and not in my lungs.
Does the DIY air purifier work? Test results (1, 2) give a conclusive answer, but this series of pictures gives a visceral answer. I took a picture of the HEPA about every seven days for four weeks. Glad that black gunk’s not stuck in my lungs instead. In static form, here’s Week 0 and Week […]