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Global Plastics is a Very Big Problem

June 3, 2018 by 1 Comment

Plastic bags, bottles and many other wastes are causing widespread harm to marine and coastal ecosystems — they kill massive numbers of marine animals (including 1 million seabirds and 100,000 marine mammals annually in one widely cited estimate), degrade their environment, and enter the food chain.  A recent study in Marine Policy on ocean debris showed that a plastic bag was located nearly seven miles below the surface in the Mariana Trench.

Nearly 700 species, including endangered ones, are known to have been affected by it. Some are harmed visibly—strangled by abandoned fishing nets or discarded six-pack rings.

The May 24 OECD report  cites data showing that worldwide, just 14 to 18 percent of waste plastics are recycled, 24 percent is thermally treated, the rest is disposed of in landfills, open burning, or gets into the environment via “uncontrolled dumping” and other means.

Plastic pollution is emerging as one of the most serious threats to ocean ecosystems, and world leaders, scientists, and communities recognize the need for urgent management measures for the sustainability of marine ecosystems.

The damage caused by plastic debris in large animals through accidental ingestion and entanglement in floating plastic and the hazards posed by toxic chemicals released from fragmented plastic on the biological function of marine organisms have been well studied [see science direct report]. Micro-plastic ingested by zooplankton can be transferred to higher trophic level animals, including commercially important fish species, through the food web. The United Nations Sustainable Development Goal 14.1 urges the world community to take action to reduce marine pollution by 2025, and one of the indicators to track its progress is the density of floating plastic debris (http://www.un.org/sustainabledevelopment/oceans/).

Larger plastic is getting broken into pieces so small they’re hard to see, and they have “potential for large-scale accumulation” in the ocean.

Plastics are also a major source of oil demand. They currently account for around 4-8 percent of worldwide oil and gas consumption, per the OECD. Tougher curbs on plastics could have the spillover effect of altering global oil demand levels. BP’s chief economist said in February that various policies, such as stringent restrictions on plastic bags, could shave 2 million barrels per day from global oil demand by 2040.

Under a bridge on a branch of the Buriganga River in Bangladesh, a family removes labels from plastic bottles, sorting green from clear ones to sell to a scrap dealer. Waste pickers here average around $100 a month.(Photo courtesy of National Geographic)

 “By mid-century, it is estimated that the ocean could have more plastic than fish by weight,” the OECD notes. A new video on their report is here.

Roughly 4 billion tons of plastic waste produced since the 1950s hasn’t been recycled or burned. And, plastic production is expected to double over the next two decades.

Today, plastic bottles made of polyethylene terephthalate (PET) are largely broken down through mechanical recycling — it’s separated, shredded, washed and melted. The process is labor intensive and the product is degraded plastics that are often made into lower-value secondary products that are not recycled again. Researchers from Colorado State University  report designing a plastic that can be recycled repeatedly without degrading the polymer and retaining its most useful properties.
The amount of unrecycled plastic waste that ends up in the ocean is unclear. In 2015, Jenna Jambeck, a University of Georgia engineering professor, provided a rough estimate: between 5.3 million and 14 million tons each year just from coastal regions. Most of it is dumped carelessly on land or in rivers, mostly in Asia. It’s then blown or washed into the sea.

There is no great solution waiting to be found here. Simply, the world needs to collect its trash.  We need garbage trucks and help ensuring that waste is collected on a regular basis and landfilled, recycled, or burned so that it doesn’t blow away.

 

How to pay for this?

A worldwide tax of a penny on every pound of plastic resin manufactured. The tax would raise roughly six billion dollars a year that could be used to finance garbage collection systems in developing nations.

Filed Under: Bottom, News

Comments

  1. Hope Wright says

    June 4, 2018 at 11:03 am

    Just saw that a dead whale washed ashore in Thailand with 17 POUNDS of plastic in its stomach. As you know, part of the Pacific is called “the Plastic Ocean”. 😢

    Reply

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