please provide short answers to the following questions and upload your responses to blackboard by the due date 1 what are the four phases of the life cycle assessment lca process 2 what is a material recovery facility mrf and what is the differ

Please provide short answers to the following questions and upload your responses to Blackboard by the due date.

1. What are the four phases of the Life Cycle Assessment (LCA) process?

2. What is a Material Recovery Facility (MRF) and what is the difference between a clean and dirty MRF?

3. What is a waste exchange? Please visit an online waste exchange and list some of the materials that are available.

4. Please read a case study document of your choice from the folder ‘Sustainability Case Studies’ and explain how it is doing an excellent job in terms of their sustainability efforts. Or discuss about any one major environmental, economic and social benefit from their initiative.