Of the 10 cities around the world with the most-polluted air, the World Health Organization says, seven are in China. The WSJ's Diana Jou spotlights AirWaves, a prototype pollution mask that ...

An curved arrow pointing right. Beijing’s smog problem continues to hinder daily life, this time reportedly causing a massive traffic jam. Follow BI Video: On Twitter More from Transportation ...

BEIJING--Authorities issued their highest warnings for fog and haze on Tuesday as smog enveloped major cities in northern China, warning the public that visibility could drop to less than 50 ...