The air pollution menace and the thick smog that Delhi has to brave as an eventuality every winter, a similar thick haze is now creating havoc in India's financial capital Mumbai. For yet another day, Mumbai remained under the blanket of thick haze as pollution levels rose marginally. On Wednesday, average air quality index (AQI) of 275 was recorded compared to 271 just a day before. Such quality of air is harmful to sensitive people considering an AQI of between 201 and 300 is poor. The quality of Mumbai air was worse than Delhi which recorded an AQI of 211. Over the previous days, the Delhi AQI has seen a significant improvement. Meanwhile, minimum temperatures in Mumbai have also risen. Mumbai's overall AQI was 275 which falls in the 'poor' air quality category. Safar monitored 10 specific locations in the city and 6 out of 10 recorded an AQI in the very poor category (between 301 and 400). Mazgaon (342), Bhandup (327), Bandra Kurla Complex (327), Borivli (319), and Colaba (320). even Navi Mumbai's AQI was similarly low at 309. Meanwhile, in Delhi, more than two dozen polluting factories were razed in Loni town on the instructions of District Magistrate Ritu Maheshwari on Wednesday, officials said, adding that this was done keeping in mind the air quality of Delhi NCR. The action, that came on repeated complaints by Krishna Vihar colony residents, also comes as part of the government's efforts to make amends by implementing ways to curb the capital's deteriorating air quality. A fortnight-long Clean Air for Delhi Campaign jointly organised by the Delhi government and the Centre, will be launched on February 23 to create awareness against air pollution, Environment Secretary Anil Kumar Singh said in the meeting.