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How much plastic is in the ocean?

12 Jul

The following is an article from Discovery News, and in conjunction with ICCS.

Analysis by Michael Reilly
Thu Jul 8, 2010 07:01 PM ET
Stiv Wilson of the ocean conservation group 5 Gyres has made a first attempt to tally how much plastic is in the global ocean.
We’ve all heard about the Texas-sized “garbage patch” swirling in the North Pacific, and recently we’ve been warned that . Rather than distinct patches, the planet’s interconnected watery parts are effectively a thin soup of plastic refuse, with perhaps larger concentrations of rubbish in five large rotating gyres of water like the Pacific’s.
The more people look, the more grim the situation looks. But how can we get our heads around how big the problem really is? How much plastic is really in the ocean, and can we clean it up?
In a new post on 5gyres.org, Wilson takes what appears to be the first-ever stab at trying to figure it out.
The number he comes up with is staggering: he conservatively estimates there are 315 billion pounds of plastic in the oceans right now.
Now, Wilson will be the first to admit a lot of assumptions were made in order to arrive at that number, but most of them err on the side of caution. It’s worth going through his thought process and calculations here.
To help visualize that massive heap of trash, Wilson divides by a “supertanker” — that is, a giant ship that could theoretically sail through the seas, skimming out the plastic junk as it goes (much of which hovers down to 90 feet below the surface).
No such ship has been outfitted to skim plastic. But let’s say it did, and it could hold 500 million pounds of plastic. You’d need 630 of them to do the job, or about 17 percent of the planet’s current fleet of oil tankers.
Yipes.

To make it a little more personal, every American produces about 600 pounds of garbage each year. The proportion of plastic varies from household to household, but overall about half of all waste is synthetic. Some of that probably ends up in landfill, or recycled (Wilson says only about 3 percent of virgin plastic gets recycled).
Either way, the pile of plastic you inadvertently dump into the ocean each year is probably more than you can lift.
The point of the calculations is this: cleaning up the plastics in the ocean ain’t gonna happen. Well-intentioned programs designed to take the fight to the high seas, like Project Kaisei and theEnvironmental Cleanup Coalition, for example, are exercises in futility.
“I’m not trying to call them out,” Wilson told Discovery News. “What I really fear is a barge full of plastic coming in under the Golden Gate bridge, the media taking pictures and people thinking ‘oh good, we’ve solved that problem.'”
A real cleanup would be astronomically expensive, both in terms of dollars and equipment.
But hope is not lost. Wilson added that if we can ratchet down the amount of plastic we throw away, the gyres will naturally spin out much of the junk floating in them. Eventually it will wash ashore, where it can easily be removed.
“I really want to see people’s efforts focused on beach cleanups,” he said. “They’re free, can be organized in a grassroots way, and they can make a massive difference. A hundred people on a beach picking up plastic for a weekend can clean up as much as a barge can hold.”

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1 Comment

Posted by on July 12, 2010 in i-Wish

 

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One response to “How much plastic is in the ocean?

  1. Rich Sundance Owen

    July 13, 2010 at 3:57 am

    Aloha Michael

    We couldn’t agree more with Stiv and 5 Gyres .org, post consumer cleanup could be incredibly expensive and time consuming, in the middle of the oceans. An ounce of prevention is worth a pound of cure. You see the problem is not in the ocean, that is the symptom. The real Problem is that most people don’t know that our current life style is literally killing our oceans.
    And that plastic and toxins are entering our food chain. This then becomes an education and awareness movement. The Oceans are calling for each of us to do our part. Whether we agree on a Gyre Cleanup, is mute. What we do all agree on is that immediate action is required by as many as we can inspire. People find their passion and motivation in different places. Some by science, technology, natural disaster, the environment, humanitarian causes or by the possibility that some day we could fly. We say we won’t know unless we try. What would the world be like if we all where the same ? Boring !

    “The Gyre Cleanup Project begins on the Islands”. “Nature is doing what man has yet to figure out; How to safely remove plastic from the marine environment without damaging the marine life.”

    Environmental Cleanup Coalition invites you to join in. In any the ways you feel called. “The Gyre Cleanup Project begins on the Islands”, “In My Back Yard” and “Adopt a Reef” are just a few ways in which we invite participation.

    Thank you for doing all that you do for an abundant future for seven generations to come.

    “Be the change you’d like to sea in the world.”

    Aloha
    Richard Sundance Owen

     

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