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Found the most radioactive place on Earth

27.07.2019

The level of radiation in the Marshall Islands in the Pacific Ocean is still dangerous for people's lives, although many years have passed since the tests. This conclusion was made by scientists at Columbia University, after examining the soil on the islands.

In 38 soil samples from 11 different islands, an excess of radioactive elements was found - americium, cesium and two types of plutonium. The highest concentration is on Bikini Island, where the United States of America conducted the largest hydrogen bomb test in human history.

More plutonium was found there than at Chernobyl or Fukushima. In addition, the researchers checked the radiation levels in the fruits of trees in the affected regions and in the area of ​​​​the crater formed as a result of the Castle Bravo test, where in 1954 a 15-megaton hydrogen bomb was detonated on Bikini Atoll.

Radiation contamination at inspected sites is excessively high. Despite the fact that the islands are not inhabited, the government is obliged to notify the inhabitants of neighboring islands of the danger.

The United States, France and the United Kingdom conducted tests in the Pacific Islands from 1946 to 1996. The Cactus bomb in 1958 left a deep crater on Runit Island. Later, waste from dozens of other tests was dumped into it. From above, the crater was covered with a round concrete dome with a diameter of 115 meters and a thickness of 45 centimeters. Tourists are periodically brought here, who can be photographed right on the concrete plate.

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Microplastics at the bottom of the ocean are more dangerous than on the surface 28.04.2020

Every year, humanity adds an additional to the main amount of plastic pollution in the world's oceans, thus creating an even greater problem of plastic pollution than previously discussed.

A team of ecologists from the University of Manchester has shown that microplastics - representing the main threat to marine and ocean ecosystems in this context - can accumulate not only on the surface of the water, forming a kind of islands, but also accumulate in rather large piles in the deep layers of the ocean, even more complicating the environment.

The specialists took the Mediterranean Sea as the basis for the comparison model, where they compiled their map of plastic pollution - they found that microplastics tend to accumulate in those parts of the deep layers of water that are formed by undercurrents, which, along with garbage, also carry oxygenated water and various kinds of important trace elements for maintaining the normal life of the marine ecosystem.

It is the underwater heaps of microplastics that have a more pronounced threat, since they are formed unevenly and almost always chaotically, which not only complicates the ability to predict the place of their subsequent appearance, but also directly eliminate them from under the water. At the same time, according to the researchers, most of this microplastic is made up of various fabric materials that previously served as the basis for clothes, shoes and other similar products, which are often thoughtlessly thrown out by people.

Microplastics have another feature, namely the ability to accumulate in the most active regions in terms of the underwater ecosystem, thus posing a greater threat for a much longer time. It remains only to wait for the next stage of the study, when experts should identify the real indicators of the current microplastic pollution in the Mediterranean Sea.

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