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Plastics, even those not containing BPA, have been found to produce chemicals similar to estrogen. People are worried about the effects these microplastics will have on the ecosystem and, ultimately, on the human body. For years the testosterone levels in western men have been falling. I personally attribute this to a lack of need for the hormone. Many men lead cushy easy lives today compared to how it was a few hundred years ago. No longer can only the strongest survive. Physically weaker people are able to live comfortable lives and procreate. People also attribute this(lower t levels in men) to the increase in microplastics in todays environment.
People are also generally concerned with plastic use and where it comes from. So it’s not like we only care about microplastics.
However, it’s much easier to deal with a tube you can see with your eyes than with microplastics you cannot see. So microplastics in toothpaste will end up directly in the water whereas a plastic tube will end up in disposal somewhere. It could still end up in the ocean, but it’s hardly guaranteed.
they’re generally concerned about ingesting (eating) those microplastics and then having them accumulate in their stomachs.
besides that, larger plastics also are easier to collect and have them recycled (in theory at least) than microscopic particles.
but yeah from an environmental standpoint all plastics “deserve to be worried about”.
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