WASHINGTON Its a beach bummer. Shorelines worldwide are clogged with trash, so much so that during their annual cleanup last year, volunteers with the Ocean Conservancy picked up refuse that weighed as much as 10 Boeing 747 jumbo jets.

Cigarettes, food packaging and plastic bottles topped the list from the 2012 cleanup. Debris from the Japanese tsunami and Hurricane Sandy also marred some U.S. beaches, the Ocean Conservancy, a nonprofit group that works on ocean protection, reported Monday. Volunteers turned up some weird stuff, too: mattresses, candles, toothbrushes and sports balls.

More than 550,000 people picked up in excess of 10 million pounds of trash along 17,719 miles of international coastlines in September during the Ocean Conservancys annual cleanup. Billed as the largest ocean-related volunteer effort in the world, the event spotlights just what sort of ocean trash washes up on beaches around the world and what can be done to scale back the refuse.

Every piece of trash affects the health of the ocean and as a result the economy, the environment and animal health, said Nicholas Mallos, Ocean Conservancys marine-debris specialist and a conservation biologist. Plastic debris has two risks, he said. Theres an entrapment or strangulation risk to wildlife. But the longer plastics are in the ocean, the more likely they are to absorb other toxins, too.

Plastics leach chemicals into the environment, but plastics also absorb chemicals from the environment, he said. And certainly when animals fish or other marine organisms ingest those plastics, theres some accumulation of those toxins in their systems and as they move up the food chain.

Theres also a real cleanup cost to coastal communities. In tourism-dependent beachfront destinations such as Myrtle Beach, S.C., having a pristine appearance is crucial to attracting visitors. In the summer, the city mushrooms from 27,000 year-round residents to the biggest city in South Carolina. And Myrtle Beach spends about $1.1 million annually on trash pickup.

Beaches in places like Alaska, with more than 44,000 miles of coastline, much of it remote, face a separate challenge. Currents and winter storms bring significant debris to the state each year, according to the National Oceanic and Atmospheric Administration. There, the problem is more likely to be abandoned fishing equipment.

Its not enough just to pick up the trash, Mallos said. The Ocean Conservancy would like people to focus next on producing less waste before it makes its way into the oceans. That means taking simple steps such as avoiding single-use products and embracing reusable water bottles, coffee mugs and grocery bags.

By getting out there and removing everyday forms of trash from our beaches, and really systematically re-evaluating our daily lives and the choices we make, Mallos said, we can keep trash from the beaches and ensure that in the face of future natural disasters, we have a more resilient ocean ecosystem.

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Dirty beaches make sick oceans, says group