Residents from Maina, Pirla, Cavrem, Colomba and adjoining areas are gearing to oppose Goa Pollution Control Board's public hearing for renewal of mining leases. According to sources, Goa Pollution Control board has fixed three pubic hearings of three mines at Chandreshwar Temple, Cotto, Amona-Quepem on June 21. Villagers alleged that the mine owner who had applied for renewal of mining lease has already started mining operations, causing extensive damage to the environment. "The mine owner was booked and fined by the forest department for illegal cutting of trees,' said a local.