For the last three decades scientists and world leaders have been trying to cope with the consequences of exponential growth in human numbers and the increasingly frantic demands for the resources that only nature can provide. They have been working to save threatened species from extinction and to give the natural process of our world the chance to maintain a healthy global biosphere. That means some sacrifices and restraints. Evidently, we can no longer pursue short term prosperity without a thought for long term survival. People in some industrialized countries have missed the fact that efforts to achieve conservation of nature threaten human economic welfare. But nations realize that a good quality of life can only be made up of both material well-being as well as a healthy, productive and natural environment. For millions of people living in the less prosperous parts of the world, like Bangladesh, care and conservation of natural resources, restraint, and cautious disposal of toxic wastes, hazardous effluents and sludge from the industries are the only ways to improve conditions.