answer the following questions to complete Homework 3. Necessary library and Internet research are needed to answer these questions. Make sure your answers meet course requirements:

1. What are the leading risk factors that contribute to death and disability in low- and middle-income countries, and how do they differ from those found in high-income countries?
2. Given current trends in risk factors, what re likely to be the major cause of death and disability in low- and middle-income countries in the 2020s and beyond? Which policies and actions taken over the next decade at national and international levels could influence these trends, and which factors might facilitate their implementation.
3. What are the characteristics of particular environmental health problems that render them more, or less, tractable to amelioration or elimination?
4. As the scale of human impact on the global “environment” increase, people become more concerned about the consequences of disruption of our “habitat.” What does this signify?