Committed to PEOPLE'S RIGHT TO KNOW Vol. 5 Num 1096 Sun. July 01, 2007       Metropolitan 'Sono Filter to help save lives of 50 cr people in S Asia' Dr Abul Hussam, left, and Dr AKM Munir, right, winners of Grainger Challenge Prize for Sustainability, 2007, hold the citation at a reception accorded to them at the Teacher-Student Centre auditorium in the city yesterday. Former chief adviser to the caretaker government Justice Muhammad Habibur Rahman, middle, is also seen. PHOTO: STAR