Delhi Environment Minister Gopal Rai said that two days back the AQI was 171 but as the incidents of stubble burning increased in neighbouring states, the AQI started getting worse.
Despite a ban on stubble burning in Punjab and Haryana, farmers continue to defy it as there is a short window between harvesting paddy and sowing wheat.
Delhi Environment Minister Gopal Rai held a dialogue session with social groups to promote green initiatives such as car pooling.
Every winter, Delhi witnesses a surge in air pollution levels due to many reasons, including stubble burning in neighbouring states.
The 20-metre-tall structure, being set up to improve air quality in a radius of around 1 km, was supposed to be ready by June 15.