NEW DELHI: The national capital on Saturday entered the "red zone" after the air quality index (AQI) crossed 400-mark, making the situation adverse for Delhiites and the citizens in the national capital region. With a 24-hour average AQI of 361, Delhi became the country’s second most polluted city, according to CPCB data. Several areas, including Wazirpur (420), Burari (418), and Vivek Vihar (411), recorded "severe" pollution levels, while most others hovered in the ‘very poor’ range. In the NCR, Noida (354), Greater Noida (336), and Ghaziabad (339) also reported hazardous air, underscoring the region’s worsening smog crisis. The air quality early warning system for Delhi has forecast that the city’s air will stay in the ‘very poor’ category for the coming days. Since Diwali, the capit

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