Plastic bags are killing us

The most ubiquitous consumer item on Earth, the lowly plastic bag is an environmental scourge like none other, sapping the life out of our oceans and thwarting our attempts to recycle it.

By Katharine Mieszkowski

REUTERS/Rafiqur Rahman

Aug. 10, 2007 | OAKLAND, Calif. -- On a foggy Tuesday morning, kids out of school for summer break are learning to sail on the waters of Lake Merritt. A great egret hunts for fish, while dozens of cormorants perch, drying their wings. But we're not here to bird-watch or go boating. Twice a week volunteers with the Lake Merritt Institute gather on these shores of the nation's oldest national wildlife refuge to fish trash out of the water, and one of their prime targets is plastic bags. Armed with gloves and nets with long handles, like the kind you'd use to fish leaves out of a backyard swimming pool, we take to the shores to seek our watery prey.

Dr. Richard Bailey, executive director of the institute, is most concerned about the bags that get waterlogged and sink to the bottom. "We have a lot of animals that live on the bottom: shrimp, shellfish, sponges," he says. "It's like you're eating at your dinner table and somebody comes along and throws a plastic tarp over your dinner table and you."

This morning, a turtle feeds serenely next to a half submerged Walgreens bag. The bag looks ghostly, ethereal even, floating, as if in some kind of purgatory suspended between its briefly useful past and its none-too-promising future. A bright blue bags floats just out of reach, while a duck cruises by. Here's a Ziploc bag, there a Safeway bag. In a couple of hours, I fish more than two dozen plastic bags out of the lake with my net, along with cigarette butts, candy wrappers and a soccer ball. As we work, numerous passersby on the popular trail that circles the urban lake shout their thanks, which is an undeniable boost. Yet I can't help being struck that our efforts represent a tiny drop in the ocean. If there's one thing we know about these plastic bags, it's that there are billions and billions more where they came from.

The plastic bag is an icon of convenience culture, by some estimates the single most ubiquitous consumer item on Earth, numbering in the trillions. They're made from petroleum or natural gas with all the attendant environmental impacts of harvesting fossil fuels. One recent study found that the inks and colorants used on some bags contain lead, a toxin. Every year, Americans throw away some 100 billion plastic bags after they've been used to transport a prescription home from the drugstore or a quart of milk from the grocery store. It's equivalent to dumping nearly 12 million barrels of oil.

Only 1 percent of plastic bags are recycled worldwide -- about 2 percent in the U.S. -- and the rest, when discarded, can persist for centuries. They can spend eternity in landfills, but that's not always the case. "They're so aerodynamic that even when they're properly disposed of in a trash can they can still blow away and become litter," says Mark Murray, executive director of Californians Against Waste. It's as litter that plastic bags have the most baleful effect. And we're not talking about your everyday eyesore.

Once aloft, stray bags cartwheel down city streets, alight in trees, billow from fences like flags, clog storm drains, wash into rivers and bays and even end up in the ocean, washed out to sea. Bits of plastic bags have been found in the nests of albatrosses in the remote Midway Islands. Floating bags can look all too much like tasty jellyfish to hungry marine critters. According to the Blue Ocean Society for Marine Conservation, more than a million birds and 100,000 marine mammals and sea turtles die every year from eating or getting entangled in plastic. The conservation group estimates that 50 percent of all marine litter is some form of plastic. There are 46,000 pieces of plastic litter floating in every square mile of ocean, according to the United Nations Environment Programme. In the Northern Pacific Gyre, a great vortex of ocean currents, there's now a swirling mass of plastic trash about 1,000 miles off the coast of California, which spans an area that's twice the size of Texas, including fragments of plastic bags. There's six times as much plastic as biomass, including plankton and jellyfish, in the gyre. "It's an endless stream of incessant plastic particles everywhere you look," says Dr. Marcus Eriksen, director of education and research for the Algalita Marine Research Foundation, which studies plastics in the marine environment. "Fifty or 60 years ago, there was no plastic out there."

Following the lead of countries like Ireland, Bangladesh, South Africa, Thailand and Taiwan, some U.S. cities are striking back against what they see as an expensive, wasteful and unnecessary mess. This year, San Francisco and Oakland outlawed the use of plastic bags in large grocery stores and pharmacies, permitting only paper bags with at least 40 percent recycled content or otherwise compostable bags. The bans have not taken effect yet, but already the city of Oakland is being sued by an association of plastic bag manufacturers calling itself the Coalition to Support Plastic Bag Recycling. Meanwhile, other communities across the country, including Santa Monica, Calif., New Haven, Conn., Annapolis, Md., and Portland, Ore., are considering taking drastic legislative action against the bags. In Ireland, a now 22-cent tax on plastic bags has slashed their use by more than 90 percent since 2002. In flood-prone Bangladesh, where plastic bags choked drainage systems, the bags have been banned since 2002.

The problem with plastic bags isn't just where they end up, it's that they never seem to end. "All the plastic that has been made is still around in smaller and smaller pieces," says Stephanie Barger, executive director of the Earth Resource Foundation, which has undertaken a Campaign Against the Plastic Plague. Plastic doesn't biodegrade. That means unless they've been incinerated -- a noxious proposition -- every plastic bag you've ever used in your entire life, including all those bags that the newspaper arrives in on your doorstep, even on cloudless days when there isn't a sliver of a chance of rain, still exists in some form, even fragmented bits, and will exist long after you're dead.

Next page: The utter pain of recycling the damn things