Q1:  Where do microplastics come from?

Q2:  How do microplastics and other waste end up in the ocean?

Q3:  How much plastic is in the ocean and how well can we quantify these numbers?

Q4:  What work has been done on understanding how much plastic might be in the ocean?

Q5:  How should we interpret the existing numbers quantifying plastic in the ocean?

Q6:  Can you be more precise about defining a microplastic?