A massive floating boom is supposed to clean up the Pacific. Can it work?

A nearly 2,000-foot-long tube is towed offshore from San Francisco Bay on Saturday. It's a giant garbage collector and the brainchild of 24-year-old Boyan Slat, who aims to remove 90 percent of ocean plastic by 2040.
A nearly 2,000-foot-long tube is towed offshore from San Francisco Bay on Saturday. It's a giant garbage collector and the brainchild of 24-year-old Boyan Slat, who aims to remove 90 percent of ocean plastic by 2040.