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The cleanest place on earth

02.06.2020

Scientists from Colorado State University have found a region of the atmosphere on Earth that has not been affected by human activity.

The study found that the cleanest air on Earth can be found in the Southern Ocean south of 40 degrees south latitude. A group of scientists have discovered that the planetary boundary layer (the lower layer of the planet's gaseous envelope - ed.), which feeds the clouds over the Southern Ocean, is absolutely clean. No aerosols were found there, which are formed as a result of anthropogenic activity and are carried by the wind over great distances.

According to scientists, weather and climate are complex processes that bind together every part of the world, and therefore it is so difficult to find a corner on Earth that is not affected by people. Creidenweiss and his team hypothesized that the air over the remote Southern Ocean surrounding Antarctica would be the least affected by people and dust from the continents.

The samples were collected during field research, the ship with scientists passed south from Tasmania to the Antarctic ice edge. Air samples were taken in the marine boundary layer, which has direct contact with the ocean.

With the help of DNA sequencing, it turned out that the microorganisms in the air samples were local, brought there from the surrounding ocean. The air over the Southern Ocean was so pure that the researchers did not even have enough DNA to work with.

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Coffee with milk acts as an anti-inflammatory 31.01.2023

Coffee with milk has an anti-inflammatory effect on the body, scientists from the University of Copenhagen found.

Whenever bacteria, viruses, and other foreign substances enter the body, the immune system reacts by using white blood cells and various chemicals to defend itself, and this causes inflammation. In addition, inflammation can be caused by oxidative stress - damage to cells as a result of oxidation by oxygen. Polyphenols are known to be beneficial to humans as they help reduce oxidative stress.

"When a polyphenol reacts with an amino acid, its inhibitory effect on inflammation in immune cells is enhanced. We tested immune cells treated with a combination of polyphenols and amino acids. They were found to be twice as effective at fighting inflammation than cells to which only polyphenols were added. ", the researchers noted.

Coffee beans are high in polyphenols and milk is rich in proteins. Therefore, scientists came to the conclusion that drinks containing these components have a beneficial effect on immunity.

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