Winter Is Coming

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 …

Read more

Flickr Photo

Is Summer Air Better Than Winter Air?

Summer is here, bringing with it clearer skies and certainly cleaner air. Right? Summer always seems to drive out the dense clouds of pollution that suffocate many Indian cities. However, while summer air is in fact cleaner than air during other seasons, it’s still far from safe according to the …

Read more

Does Spring Bring Better Air to Delhi?

Delhi Winters are notoriously known for bad levels of air pollution, but we often hear that air gets cleaner come Spring. We were curious what was happening in our own backyard, so we put out our Dylos Particle Counter on a rooftop near our Saket office.  The Particle Counter measures particle counts between 0.5 …

Read more

Winter (Air) Is Coming

Another year, another Beijing winter. As winter arrives to Beijing, I got to wondering: how much worse is winter air? To get to the bottom of it, I analyzed the last seven years of US Embassy PM 2.5 data. I found that the capital’s air has averaged 111 micrograms in …

Read more

Preparing for Air Pollution in Ulaanbaatar, Mongolia

Air purifiers and air pollution are probably the last things that come to mind when thinking of Mongolia. But maybe it should be the first, given how bad the air there is. I was living in Beijing during the airpocalypse, so I decided to buy an air purifier. Then I discovered …

Read more

What Time of Day Is PM 2.5 the Lowest?

My intuition has always been that air pollution is lowest at night because there are fewer cars on the road and fewer factories humming. Apparently I’m not alone: 139 voted for their guess about what time of day has the lowest PM 2.5, and night time came in first: I …

Read more

Chinese New Year fireworks pollution

Do Chinese New Year Fireworks Pollute Indoor Air?

I’ve posted data before showing that outdoor air quality is strongly correlated with indoor particle counts (r = .71), but Chinese New Year gives nerds like me a great chance to see what happens when we get a momentary shock to air quality. The media made a big deal about people cutting …

Read more

Smart Air is a social enterprise that creates simple, no-nonsense air purifiers and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.