Patan (Lalitpur), Dec 29: Minister for Forests and Environment and Chairman of the National Trust for Nature Conservation (NTNC), Madhav Prasad Chaulagain, has expressed his commitment to focus on making the zoo management efficient and the conservation campaigns more effective.Addressing a programme oraganized at Jawalakhel today on the occasion of the 30th anniversary of the Central Zoo Management and the release of a souvenir publication and an award ceremony, he praised the central zoo management for playing an important role in nurturing a harmonious relationship between humans and animals.