Subject(s): Global warming -- Global temperature changes -- Climatic changes -- Economic aspects. -- Some basic about world environmental change, environmental change- an Issue of human concern, expected disasters for resources and activities of humanity -- Consequences on global food production, sustainable power and environment, environmental safety and coal policy, role and rules of international agreements, GATT, WTO, obstacles for third world countries, global agencies on environment, global development of last decade- concept of justice, awareness generation about the changing world environment -- Background of environmental records, learning from past, lessons for future, precautionary principle (regarding environmental change), intergovernmental panel on climate change- report of working group-II, global environmental concerns, computer and scientific study of environmental change, Economics of changing environment