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Russian scientist busts myths about microplastics.
[ From RT News ]
Alarming media reports about the harm of microplastics to the human body and the environment are greatly exaggerated, Alexei Khokhlov has told RT.
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The molecular structure of polymers consists of long chains of monomer units. Interestingly, we are made up of polymers ourselves, since proteins, DNA and RNA chains are molecules of such type.
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Nanoparticles of dust, sand, and natural polymers like cellulose can enter cells. Wood itself is essentially a composite material made from cellulose and lignin. Annually, around 2.5 billion tons of wood are produced globally, while plastics account for only 400 million tons. It’s a very small amount compared to natural polymers.
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All nanoparticles can enter the human bloodstream, not just microplastics. For instance, walls gradually disintegrate into dust and sand, which also make their way into the human body. There is no evidence that microplastic particles are particularly harmful.
Humanity has coexisted with ordinary dust for millions of years, and it doesn’t harm us. When any particle enters the human body, it is coated by biological fluids that include fragments of bacteria, proteins, etc. A ‘biocorona’, or coating made up of these fragments, forms around the particle, so it cannot affect the human organism. This process occurs with all particles, regardless of their composition — microplastics included. For the body, there is no difference between microplastics and dust.
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Because the media needs sensational stories. The idea that wood particles can enter human cells isn’t shocking because wood is familiar to us and no one believes it could pose any risk. Synthetic polymers, however, evoke fear because they are unfamiliar and artificial. But there’s no evidence to suggest they act differently than other particles.
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Moreover, the primary sources of microplastics are not plastic utensils or packaging but washed [synthetic] clothes, worn automobile tires, urban dust, and even road markings and marine paint. This suggests that combating microplastics would require us to give up driving cars and using washing machines. But what would that lead to? People cannot forgo hygiene standards, and our current infrastructure and logistics cannot provide alternative solutions that would meet the needs of society.
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read the whole article..
https://www.rt.com/news/612723-alarming-media-reports-microplastics/
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