Xian Air Pollution

What Is The Most Polluted City in China? (2020)

Cities in China have consistently ranked among the most polluted in the world. Just how bad is it? Smart Air analyzed 2020 pollution data from 52 cities in China to find the most polluted cities in in China. Rankings: Most Polluted Cities in China (2020) 1) Anyang, Henan Province (44 … Read more

Shanghai air quality and PM2.5 concentration in year 2019

Shanghai Air Pollution Progress Stalls, Worsens Slightly

A Smart Air analysis of 2019 air pollution data found that Shanghai’s PM2.5 improvement has stalled out, actually increasing by 3% over 2018. A tally of “good” air dropped by 9.3% in 2019. In 2018, 32% of days in Shanghai qualified as “good”. In 2019, that dropped to 23%. Daily … Read more

Did China’s Air Quality Improve in 2019?

After a big improvement in 2018, new data shows China’s war on air pollution is slowing down. A Smart Air analysis of 2019 PM2.5 data for China’s 15 largest cities found that more than half saw worse air quality over 2018. Maps comparing average PM2.5 in December 2018 to December 2019 … Read more

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

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

Indoor Air vs Outdoor Air: Which is Dirtier?

In places with heavy air pollution, going outside can often be daunting. Countries likes China, India and Indonesia see outdoor air pollution levels over 10 times the World Health Organisation safe limit. But are indoor PM2.5 levels any better ? I’ve tested indoor and outdoor locations around Beijing to see … 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.