1. What is the biggest advantage of rail over trucking? 2. What is intermodal transportation? 3. Why is rail considered inflexible? 4. What is single sourcing? 5. How does that differ from multi-sourcing? 6. What is the triple bottom line? 7. Why is sustainability important? 8. (Thinking question) what other topics that we will discuss this semester or have already discussed relate to sustainability?.