In 2016, onlyone fourthofChinesecitiesmet the country'sairqualitystandards, according to a surveyof 338 cities nationwide from the MinistryofEnvironmentalProtection.
The U.S. Embassy in Beijing publishes AQI values for Beijing and other cities in China, and the ChineseMinistryofEnvironmentalProtection provides its own air quality data for cities throughout the country.
Tighter diesel fuel standards could help reduce vehicle emissions by as much as 15%, according to Yue Xin, head of the vehicle fuels and emissions lab at the Chinese Research Academy ofEnvironmental Sciences, which is affiliated with the EnvironmentalProtectionMinistry.