You can look at Cali's approach two ways. 1) It's way overboard or, 2) you can wonder how micro ball plastics were ever allowed to exist and have now contaminated all of our waters and our bodies.
In the case of point #2, plain ignorance. Humans have a knack of coming up with technologies that have dangers not evident or acknowledged in their early days.
An example:
My father was a ground radar NCO in the RAF in the early 50s. He worked on Chain Home and saw the first of the BIG microwave radars, the Type 80, when it was still "burn before reading". Years ago he was reminiscing about those days and telling me that on night duty he would sleep in the transmitter room at his Chain Home station. He went on to say they had installed a neon bulb across the twin wire feeder that disappeared into a culvert out towards the antenna. Now, twin feeder isn't shielded, and I'm willing to bet that at the frequencies used by that radar he was subjected to a fair amount of near field radiation. It gets worse.
He then goes on to tell me that the room was lovely and warm in the winter with the four huge tubes banging away in a parallel, push-pull arrangement. I asked if the ventilation fans for the tube cabinets were noisy. He gave me this blank look and replied, "What cabinets?" Yes, there he was sleeping in blissful ignorance mere feet away from high voltage tube devices generating who knows what in the way of X-rays with zero shielding.
When he visited the Type 80, he told me of the weird purple glow from the multi-phase mercury bath rectifier device AKA The Mekon. Now I'd seen pictures of this gadget from the 70s so asked, "Oh, so they opened the lead shielding doors so you could get a quick peek." His reply was a classic. "What lead doors?"
Small wonder I was born with fouled up eyes and developed buck teeth...well, on the one head, anyway.
