Friday, December 01, 2006

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The Great Pacific Garbage Patch


Plastics are a key component in what is now called the Great Pacific Garbage Patch, a floating mass of trash that is accumulating in the North Pacific subtropical gyre. The patch is a menace to sea life. Some officials in California believe that if more plastic litter would biodegrade, it would help solve the problem.

Wikipedia has an article that describes the region known as the North Pacific Gyre...and the fluid eye of the ocean's circulation pattern. It reminds me of the eye of a hurricane...just a thicker soup.


The centre of the North Pacific Gyre is relatively stationary (the area it occupies is often referred to as the horse latitudes) and the circular rotation around it draws waste material in. This has led to the accumulation of flotsam and other debris in huge floating 'clouds' of waste, leading to the informal name The Great Pacific Garbage Patch. While historically this debris has biodegraded, the gyre is now accumulating vast quantities of plastic. Rather than biodegrading, plastic photodegrades, disintegrating in the ocean into smaller and smaller pieces of plastic, and these pieces are trapped by the gyre and remain suspended in its centre. The photodegraded plastic can attract pollutants such as PCBs, and the floating particles also resemble zooplankton, which can lead to them being consumed by jellyfish and thus entering the ocean food chain. In samples taken from the gyre in 2001, the mass of plastic exceeded that of zooplankton (the dominant animalian life in the area) by six times.



This leads to a vital question...what is "green" and what's the baseline that will really stop covering the earth's functioning ecological systems with functional inhibitors?

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