Delhi and its adjoining areas are covered in smog and air quality is still in the 'very poor' category. The fourth stage of anti-pollution measures will remain in effect for three days as no sign of relief is expected soon.
Several factors contribute to Delhi's inferior quality, including construction, the city's vehicular pollution and the stubble burning by farmers in Punjab and Haryana. While the Central Air Quality Management (CAQM), the pollution control body, has appreciated Punjab for significantly bringing down the cases of stubble burning in the state, scientist Hiren Jethva at NASA Goddard Space Flight Centre, differs and told NDTV that farmers are timing stubble burning with NASA satellites overpass time over the subcontinent leading to severe undercounting. Now, exclusive satellite images accessed by NDTV appear to confirm the inference.