What are some of the differences between neoclassical natural resource and environmental economics and ecological economics? What is carrying capacity and how does it relate to sustainable development? What is the standard circular flow model? How are natural resources included in the model? How does the broader ecological circular flow model extend the standard model? What is the primary input? What is the primary output? What is the source function? What is the sink function? How can these be affected by human activities? What are some of the microeconomic techniques used by standard natural resource and environmental economists? What is environmental macroeconomics? What is the importance of macroeconomic scale? What are some of the natural cycles relevant to environmental macroeconomics? What is the relationship between economic activity and throughput? What is sustainable development?