Authorities in India’s capital Delhi rolled out strict measures on Wednesday in an attempt to curb pollution, including a ban on vehicles not compliant with the latest emission control norms and regulating attendance in private and government offices. The air quality index in the Delhi region, home to 30 million people, has been in the “severe” category for the past few days, often crossing the 450 mark. In addition, shallow fog in parts of the city worsened visibility that affected flights and...