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 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 trains.For all the latest headlines, follow our Google News channel online or via the app.This prompted the Commission for Air Quality Management to invoke stage four, the highest level, of the graded response action plan for Delhi and surrounding areas on Saturday.The curbs ban the entry of older diesel trucks into the city, suspend construction, including on public projects, and impose hybrid schooling.Kapil Mishra, a minister in the local government, announced on Wednesday that all private and