GEORGE TOWN, Oct 30 — All pig farms in Kampung Selamat, Tasek Gelugor, have been sending livestock waste to a biogas plant in Ampang Jajar since May 4 to control pollution and... State Local Government, Town and Country Planning Committee chairman H’ng Mooi Lye said the move aims to control livestock waste discharge into the environment, particularly drains flowing into Sungai Kereh.