What will it take to get plastics out of the ocean?

A few palm trees stand strong in the salty breeze. Located on the southern tip of the Pacific island chain of Hawaii, Kamilo Beach is an isolated stretch of black volcanic shoreline in the middle of nowhere. Just a few hundred yards from shore, humpback whales rise up from the depths, colorful fish fill the reefs and rare sea turtles swim in to nest on the beach. But even in this remote place, garbage washes ashore each day. “We find a lot of toothbrushes and combs, plastic bottles and caps, over and over again,” says Megan Lamson, a marine biologist working for a local non-governmental organization, the Hawai‘i Wildlife Fund. Old Hawaiian sayings have described the bay as a place where people went looking for loved ones if they got lost at sea. “Historically that area has been kind of the catcher of things that are floating in the ocean,” Lamson says. But over time, the composition of materials that wash ashore has changed dramatically. “Back in the day it was large pieces of heavy wood from other continents,” she says, “now, unfortunately, it’s a lot of plastic.” It’s an all too familiar sight around the world. Since the early 1970s, researchers have collected plastic from beaches and oceans around the globe. At the 9-mile (14-kilometer) stretch of coastline around South Point alone, about 15 to 20 tons (14 to 18 metric tons) of trash wash up each year. “Here on Hawaiian beaches, we have debris from all around the North Pacific,” Nikolai Maximenko, an oceanographer at the University of Hawaii at Manoa, explains. Some pieces come from Asia, others from the West Coast of North America, and, Maximenko adds, “of course we have local products, too.”  From Gyre to Garbage Patch To understand how a remote place like Kamilo can get so swamped by massive amounts of trash, one must consider the hydrodynamics at play. Hawaii is located in a huge circular system of ocean currents, the North Pacific Gyre. Within the gyre, trash can get trapped and circulate for years. One region between the islands and California contains … Continue reading What will it take to get plastics out of the ocean?