Did China’s Air Get Better in 2018?

New data analysis from Smart Air shows that air quality improved in 14 out China’s 15 largest cities. This data suggests China’s “war on air pollution” seems to be working.     This analysis uses over 21,000 daily average PM2.5 data points from official sensors around the country.    Beijing Famous … Read more

After Best January on Record, Beijing PM2.5 Worsens

After best January on record, China’s air pollution worsens     An analysis by Smart Air of data from pollution stations found that, after Beijing’s best year on record, Beijing PM2.5 levels are now worse than 2017. Data from 11 other major cities showed similar trends.   Beijing Compared to … Read more

Is the Laser Egg Only Accurate in Beijing?

A few months ago, Smart Air tested the Laser Egg, the Node, and the Dylos against official PM2.5 readings. The results were way better than I expected! All three machines correlated r = .90 or higher with the gold-standard numbers, which is very high. But this test may have exaggerated their … Read more

What Time of Day Is Air Pollution Lowest?

My intuition has always been that there is least air pollution at night because there are fewer cars on the road and fewer factories humming at that time of day.   Pollution Time of Day Guesses   Apparently I’m not alone: 139 voted for their guess about what time of day … Read more

Is Guangzhou’s Air Safe?

Beijing’s air pollution is the most famous in China, but that can make people in some other cities think their air is good–at least, not as bad as Beijing’s. But is the air in other cities safe? In 2013, Shanghai had newsworthy air pollution that convinced many people in Shanghai … Read more

Smart Air is a social enterprise that creates simple, no-nonsense air purifier 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.