Why pure wool, cotton and linen?

According to a report in The Guardian, researchers from King's College London have analysed the number of fibres and particles that have fallen onto the roof of a nine-storey high building in the middle of London. They chose a spot that was so high that only microplastics from the atmosphere were collected.
The researchers had chosen eight separate days on which to collect the plastic.
They found small pieces of plastic on all 8 days, and between 575 and 1,008 pieces of plastic per square metre.
This means that if the same amount of microplastic falls all over London, it is equivalent to millions of pieces of microplastic falling every day.
"We found a high abundance of microplastics, much higher than what has previously been reported," says lead researcher on the study, assistant professor Stephanie Wright from Kings College London.
“I find it of concern – that is why I am working on it,” she said. “The biggest concern is we don’t really know much at all. I want to find out if it is safe or not”, she tells The Guardian.
335 million tons of new plastic is produced every year, and much of it ends up in the environment. The pieces of plastic that the researchers found mostly came from acrylic fibres, which are used in clothing. The size of the plastic was between 0.02 and 0.5 millimetres. ´
PhD Steve Allen of the Ecolab Research Institute in Toulouse, France, whose work has shown that microplastics create air pollution even in remote mountain areas, calls the study a wake-up call.
"The [London research] is a very well done study showing incredibly high numbers of airborne microplastics," he says.
"Currently we have very little knowledge on what effect this airborne pollution will have on humans," he tells The Guardian.
“But with what we do know it is pretty scary to think we are breathing it in. We need urgent research.”
If you think about how long the fish in our waters have lived, consuming everything from microplastics to entire plastic bags or had them wrapped around their fins with death as the result. If you think about the unimaginably gigantic plastic industry, which is never asked to restrain itself. There is apparently no end to how much plastic we as a society can digest. Is recycled plastic the way forward? What if a cap was put on so that the production does not exceed what is absolutely necessary, reusable and usable as recycled plastic? All the microplastics that are washed out in the washing of the clothes we buy will probably also end up in our groundwater. Although we clean it better, it can also be reused. As a Dane, I am very surprised that we Danes are leaders in climate policy. It doesn't quite add up. I myself do not see how I can get rid of my own overuse of plastic. So don't think I'm blaming anyone. I can only see that it must be dealt with by producing less, much less plastic. And what can help is beginning to use natural fabrics more, wool, cotton and linen, among others.