This diagram is intended to show both the environmental and social effects of the Biogas Generator in India. The two systems work as a coupled human-environment system in that they both impact each other in some way. My diagram shows the ways that certain human and environmental factors affect and are affected by each other. In many instances there are negative feedback loops like for example, the air pollution from the burning firewood has a negative effect on the health of the people. There are also positive feedback loops in this systems diagram. The compost from the Biogas Generator has a positive impact in that it creates jobs and income for the people in the village. The true driving force of this system is the size of the population in India. The increased population has caused deforestation and air pollution in the rural areas, which is essentially what drove the introduction of the Biogas Generator. In comparison to the Diagram in Marten’s “What is Human Ecology?”, my diagram has many similarities as well as differences. My diagram is slightly more specific than Marten’s in that it goes into specifics about the negative effects of the firewood as well as the positive effects of the compost produced. Similarly, both diagrams show how different materials are needed in order to use the Biogas Generator and therefore help the “population”. The reason there are similarities and differences among our diagrams is because everyone interprets the effects of different environmental and social factors differently. I might have thought something was more important to include in the diagram, while Marten could have assumed this was implied or unnecessary in displaying. By comparing the diagrams we are able to see multiple aspects of both systems that we might not have seen before. Seeing both diagram helps us to understand all elements that go into the systems and how they have different effects on one another.