The purpose of this paper is to study the situation of the environment in developing countries, and to show a sustainable development path for the society. To attain this, adequate sets of indicators or indices concerned with sustainable development as well as the environmental situation are needed. Accordingly, a major task of this paper will be to develop a new set of indicators of sustainable development and environment. Recently, the environmental situation in many developing countries has deteriorated. Environmental problems are expanding and becoming more complicated. To tackle these problems, we should arrange for data sets adequate to lead to an accurate assessment of causalities between economic-social structure and environmental problems. In this study, my viewpoint focused on the United Nation's CSD (the Commission on Sustainable Development) Indicators. By making some amendments to the CSD Indicators, a new version of the CSD Indicators was composed and some empirical investigations concerning sustainable development are given. The major findings of this paper are as follows. First, problems occur in data-shortage related to the environment especially in non-OECD countries. Second, the new version of the CSD Indicators can be effectively used to analyze environmental issues. Finally, policy implications are proposed for environmental conservation and sustainable development. The CSD Indicators should be amended and used for measures of environmental analysis and policymaking. JEL classification: Q50, Q56, Q58