Subject(s): Environmental protection. -- Pollution in Environmental aspects in Delhi Metropolitan Area in India -- Global environmental constraints in USSR, Asia, Africa, Europe, America -- Socio-economic constraints, Pollution- traffic, industries, air pollution, noise pollution, water pollution, population, wastes -- Conservation : Forests, wild life, Aravalli ranges, Yamuna river front, canal- western Yamuna canal, open spaces, monuments -- Settlements : Unauthorized colonies, slums and squatters, resettlement colonies, pavement dwellers, villages, urban villages, shahjahanbad - Delhi, housing -- City improvement : Bulk services, development controls, building bye laws, fire controls, sanitary and garbage improvement, copying an environment, concentrating civic services at a place, role of architects, painters, sculptors, administrators and journalists in city development