Thank you.
I'm going to turn back to Mr. Langdon and ask a similar sort of high-level question.
I think Dr. Arjmand brought this up. We need to have prevention, collection and recovery. Those are the three main tasks about plastic recycling. I'm wondering if, for each of those, you could say what the real challenge is, how much we could accomplish with each of those and what the tasks are ahead of us. What is the single most important thing to fix in each of those subjects: prevention and reducing plastic use, how we collect it, and how we recover a usable product?