Order of the National Green Tribunal in the matter of Biplab Kumar Chowdhury Vs Union of India & Others dated 16/04/2021. The matter related to use of amplifiers during Azaan. According to the applicant, the noise level is in violation of the Noise Pollution (Regulations and Control) Rules, 2000 in the various mosques in West Bengal, causing noise pollution and health hazards. The applicant has requested that the authorities be directed to ensure that the Azaan conforms to the decibel limits as per the Noise Pollution (Regulations and Control) Rules, 2000 throughout West Bengal.

Order of the National Green Tribunal (Eastern Zone Bench, Kolkata) in the matter of Biplab Kumar Chowdhury Vs West Bengal Pollution Control Board & Others dated 14/03/2017 regarding sand mining continuing unabated at various parts of West Bengal especially Hooghly and Bankura districts.