Name the two basic kinds of economic systems, explaining how they differ. What conditions are necessary for a country to make progress in the development of human resources and produced assets? What is the overall objective of environmental policy, and what are the objective's two most central concerns? What is the conclusion of careful studies regarding the relationship between environmental policies on the one hand, and jobs and the economy on the other hand? How has the political scene affected environmental public policy in the last few years? Describe the roles of special interest groups and political parties