<p style="margin: 0px; text-align: justify;"><span style="color: #222222;">Graded Response Action Plan (GRAP) stage three has been imposed in Delhi-NCR amid a sudden spike in air pollution due to foggy weather.</span></p>''<p style="margin: 0px; text-align: justify;"><span style="color: #222222;"><br />''</span></p>''<p style="margin: 0px; text-align: justify;"><span style="color: #222222;">The Environment Ministry said, this also includes a ban on non-essential construction and demolition work. Delhi's 24-hour average air quality index stood at 400 today which is just a notch below the severe category. The average air quality of Delhi is likely to deteriorate further tomorrow and the overall AQI is expected to stay in the 'Severe' category. </span></p>