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- Oct 5, 2023, 10:37am
- π§ 63 Β°F
- Altitude: Sea level
- Japan Sea 41Β°58β33β N 139Β°44β28β E
Nets, Nylons & Nurdles
October 5, 2023, Japan Sea β π§ 63 Β°F
Nets, Nylons and Nurdles
Flotsam & Jetsam in the Oceans
Lecture by David J. Drewry
β Charles Moore Natural History 2003 found plastics in ocean
β Flotsam- debris floating in sea
β Jetsam- garbage thrown deliberately into sea
β Lagan-debris sitting on sea bed
β 60-80% is plastic
β 100,000 marine mammals die each year from ingesting plastic
β Causes blockage. And starvation
β Whale dead with 90 lb plastic in its guts
β Tangling in fishing lines
β Poisoning by sunlight degraded plastic
β Chemicals interfere with reproductive system
β Microscopic plastic fibers from washed clothing
β Destroys coral formation
β Why plastics?
β Buoyant, durable, transparent, common
β One million plastic bottles made each Minute
β The miracle material of the twentieth century, we have become thoughtlessly addicted to using plastics for everything
β Estimated decomposition rates
β Plastic cups 50 yr
β Beverage holders 400 years
β Different types of plastics have different rates of decomposition. Some types of plastics are easy to recycle/degrade, others are difficult. Plastic cups are especially difficult and long-lasting.
β Where does plastic come from
β 80% comes from land
β Pictures of waterways completely covered by plastic
β Leading mismanagement of plastic is China followed by Indonesia, Philippines Bangladesh
β Largest concentration of plastic comes from Asia and Indonesia
β Where does the plastic go?
β Land. It is swept into the ocean from coastal tides.
β Collects in gyres
β 300 tons per day on India coast
β 20 T yr in Hawaii
β Roatan Island seas covered by plastic
β Midway Island-Albatross nests here. Eat plastics one-third of chicks die
β Great Nike Drift. 6k containers/yr fall off ships
β Movie: Robert Redford All is Lost
β May 1990 Hansa carrier lost containers that broke open full of Nike products. Washed up on coast from Oregon to Alaska
β Curious case of rubber ducks. Evergreen Laurel 1992. Storm. Lost containers of 29,000 rubber duck & toys. Curtis Ebbesmeyer, oceanographer said we could use rubber ducks to track ocean currents. Found 2 yr later in Alaska. By 2000 some were in Bering Sea. Hung in Beaufort gyre in Arctic. Went into Atlantic. Got into Gulf Stream in Cornwall.
β What do we do?
β Laws are in place. Increased manufacturer liability.
β International ocean cleanup
β Boyan Slat-
β Float barriers, and let the current being the debris. We scoop it up and carry it away. Scaled up in Pacific.
β Interceptors in rivers that feed into rivers.
β Change manufacturing materials to biogradables.
β Reduce our plastic consumption
β Recycle
β International legal measures
β Education
Nurdles are pieces of plastic that get finally worn down into little pellets.Read more
Traveler It is sad that we humans have made choices that are now killing our planet, the wildlife, the seas . We need to make some changes.