This is a great example of a human-environmental system where the population effects the environment (at the level of deforestation and smoke emissions) and the environment also effects how the people live in India. Through the use of biogas there are some instances of positive feedback loops, especially where the production of biogas is shown to increase crop yields. By increasing crop yields, there is thus more food for the human population as well as for the animals, which in turn causes more dung to be produced and allows the cycle to continue with the use of even more biofuel. The trees are somewhat resilient, although overharvesting will lead to a point of no return. This shows how the use of biogas instead of burning trees for fuel, keeps the trees at a stable number. This method also shows how improved technology can lead to a better human-environment relationship overall. Upon reviewing Marten’s systems diagram, and then comparing it with my own, I note that they both include an environmental sphere as well as a human impact sphere (How it relates to human society and the economy). There are also positive feedback loops shown in both of the diagrams. They differ however in their detailed organization in that my diagram shows the flow of impacts within each individual sphere while Marten’s shows how each sphere impacts the other. Similarities and differences arise mainly due to what is being studied, I would say. Marten’s systems diagram is looking at a much bigger picture, whereas mine is looking at a particular issue. Seeing these differences can aid us in understanding the details of an issue as well as how they might impact issues on a larger scale.