How does plastic pollution affect Henderson Island?
A study of Henderson Island in the South Pacific and the Cocos (Keeling) Islands, a remote territory of Australia in the Indian Ocean, found that plastic pollution acts as an insulator, increasing the temperature of the underlying sand.
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The team estimates 37.7 million pieces of plastic debris litter Henderson Island, exposing the extent to which the Earth's nooks and crannies have become sinks for the 311 million tons of plastic waste created annually by humans.
(By comparison, Manhattan is 22 square miles in size.) Henderson island sits in the path of the South Pacific Gyre, a major oceanic current. Such currents are known to accumulate plastic, reaching densities 2.3 million pieces per square mile.
Henderson was colonised by Polynesians between the 12th and 15th centuries, but since then the island has remained uninhabited. The inhospitable nature of the island, together with its remoteness and inaccessibility, has so far effectively ensured its conservation.
South Pacific currents dump as many as 40 million items of plastic and rubbish on the shores of Henderson Island each year, earning it the name of the most polluted island in the world.
The Great Pacific Garbage Patch, also known as the Pacific trash vortex, spans waters from the West Coast of North America to Japan. The patch is actually comprised of the Western Garbage Patch, located near Japan, and the Eastern Garbage Patch, located between the U.S. states of Hawai'i and California.
Henderson Island, which lies in the eastern South Pacific, is one of the few atolls in the world whose ecology has been practically untouched by a human presence. Its isolated location provides the ideal context for studying the dynamics of insular evolution and natural selection.
North Sentinel Island, Andaman IslandsThis island topped the list of forbidden islands. Situated in the Bay of Bengal, the North Sentinel Island is best known for its famous inhabitants: the Sentinelese. These are a small tribe who have been residing on the island for more than 60,000 years!