Without nitrogen there would be no life - no me, no you, no blue whale, no Atlantic cod, no Antarctic krill. But like anything - too much nitrogen leads to a series of negative consequences. Since the beginning of the 20th century, human activities have doubled the amount of nitrogen cycling through the biosphere and in doing so we have introduced large amounts of nitrogen into coastal waters. This excess nitrogen has led to eutrophication, loss of submerged aquatic vegetation, harmful algal blooms, increased low oxygen conditions and dead zones, fish kills, and loss of biodiversity. But this nitrogen has also allowed human population to rise to 7 billion -- in fact, about 50% of us are alive because of human fixed nitrogen through the production of fertilizer. We are currently faced with a grand challenge: how do we feed an increasing population while protecting and even restoring our environment? The goal of this course is to take on this grand challenge. We will explore the history of the nitrogen cycle and the role of social contracts, religion, and politics in shaping its current status. We will examine where our nitrogen comes from, where it goes, and what happens when it gets there. We will discuss the ethics of what we eat and how we live. Ultimately we will design a campaign that communicates to a wider audience what our nitrogen footprint (or our Bigfoot) is and how it shapes the world around us.