Concord is a brick manufacturing company that manufactures bricks using the Zigzag Kiln technology, one of the most fuel efficient and environmentally friendly brick manufacturing technology in Bangladesh. Concord operates its brick manufacturing facility on the bank of the Atharo-baki River in Khulna. The Zigzag kiln brick manufacturing process offers improved energy efficiency compared to the traditional Fixed Chimney-Bull's Trench Kiln (FC-BTK). The improved efficiency of the Zigzag kilns comes from decreased amount of energy requirement and increased proportion of class I bricks being produced. Zigzag kilns offer 20% reduction in Specific Energy Consumption (SEC) and up to 75% reduction in Suspended Particulate Matter (SPM) emissions over Fixed Chimney Bull's Trench Kiln (FC-BTK). Additionally, it also offer fuel savings of up to 27% and 20% less emissions of CO2 compared to FC-BTKs. Moreover, Zigzag manufacturing of bricks offers an average reduction in particulate matter emission of 40% compared to the much used FC-BTK.