$1.$ LCA setup: We first need to establish the goal and scope of the LCA. As noted above, we want to know which of the three mowing options has the lowest environmental impact for maintaining our golf course in Ann Arbor. As in the case of Eco$-$Audits discussed in class, we will only calculate energy and global warming potential $($GWP$)$ impacts in this assignment. You will learn more about other impacts later in the course.

a$)$ Suppose you$$re considering $2$ choices of functional unit: $1$ acre of mowed lawn with each mode of transportation, or $1$ kg of each mower. Which functional unit is better? Why?

b$)$ List two other environmental impacts $($besides energy and GWP$)$ that could be tested in this study and how they might be relevant to the mowers listed above.