Started in 2012, the Marine Debris Monitoring and Assessment Project has over 330 monitoring sites in 9 countries. Some of the top ten debris items found by volunteers include plastic fragments that are hard, foamed, and film, as well as plastic rope, glass, and metal.

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2012-2018 Marine Debris Monitoring and Assessment Project
330+ monitoring sites
4400+ surveys
9 countries
Top Ten Debris Items
1. Plastic Fragments
2. Foamed Plastic Fragments
3. Plastic Rope/Net
4. Bottle Caps
5. Filmed Plastic Fragments
6. Plastic Other
7. Plastic Beverage Bottles
8. Glass Fragments
9. Cigarettes
10. Metal Fragments