Smog engulfs Delhi, AQI 'severe'; airport issues advisory

• Delhi-NCR is covered in smog, with many areas recording 'severe' air quality index (AQI).
• The AQI in Delhi worsened throughout the week, reaching 390 on Saturday morning.
• Delhi airport issued an advisory due to low visibility, urging passengers to contact airlines.
• Experts attribute the decline in air quality to unfavorable weather conditions like low wind speeds and high moisture.
• Transport is identified as the largest contributor to Delhi's air pollution at 16.5%.

Why It Matters: Delhi's severe air quality poses immediate health risks and disrupts daily life.