… it’s a myth.
Have you heard of the giant plastic island in the Pacific Ocean? Several times in casual conversation, I’ve been told that mankind is ruining the oceans to such an extent that there are now entire islands of plastic waste. Daily Kos tells us that this “island” is twice the size of Texas!
This struck me as incredible, in the most literal sense of the word, so I decided to look into the claim.
First, we can do a quick feasibility calculation. The mass of polyethylene terephthalate (PET), the plastic from which most water bottles are made, required to create a two-Texas-sized island just one foot thick is 9 trillion pounds. That’s 15 times more [PDF] than the world’s annual production of plastic. Even if a year’s worth of the world’s spent plastic bottles could be airlifted out over the ocean and directly dropped in one spot, this island could not be made.
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So, here are the facts. Much of the ocean contains little to no plastic at all. In the smaller ocean gyres, there is roughly one bottle cap of plastic per 50 Olympic swimming pools’ worth of water. In the worst spot on earth, there is about two plastic caps’ worth of plastic per swimming pool of ocean. The majority of the plastic is ground into tiny grains or small thin films, interspersed with occasional fishing debris such as monofilament line or netting. Nothing remotely like a large island exists.
Clearly, the scale and magnitude of this problem is vastly exaggerated by environmental groups and media reports. Some researchers in the field agree, explicitly pointing out that these scare-stories “undermine the credibility of scientists.”
