1. Let's draw the system's boundaries to help us highlights what was included in the LCA and the assumptions made for each system

2. Lets' analyze the technical information presented in Table 1 -- What are the main differences among the grass-based and the confinement based system?

Answer: .

3. Lets' analyze the lactating dairy cow diets presented in Table 2 -- What are the main differences among the grass-based and the confinement based system?
Answer: .

4. Lets' analyze the on-farm emission factors presented in Table 3 -- Are there any assumptions made here that may influence our comparative analysis of the grass-based and the confinement based system?
Answer: .

5. Lets' analyze the off-farm emission factors presented in Table 4 -- What off-farm "item" appear to have a high GHG intensity (per unit of "item"
Answer: .