You are a graduate student at Louisiana State University doing research on the use of wetlands to treat domestic waste water (sewage). During your research, you have found that wetlands generally reduce nitrogen content by as much as 70 percent and phosphorus by up to 90 percent. While at a department picnic, you find yourself in a conversation with an individual interested in the summer dead zone that forms in the Gulf of Mexico. Make an argument for restoring wetlands in the Mississippi River drainage basin as a strategy to reduce the size and severity of the dead zone.

You farm kelp and sell the kelp for food and as fertilizer. The wastes from the kelp can be used in an integrated aquaculture system in which kelp farming can be coupled with farming of fish or abalone. Make an argument that you are using a sustainable system of growing a renewable resource, and explain why it is beneficial (and more sustainable) to couple algae farming with fish farming than simply to farm fish independently.