While this is certainly an interesting thing to know, there was no quantitative data provided about the discoveries. While a bunch of rare earth metals wandering around the atmosphere is certainly not a common occurrence, knowing whether we’re talking about parts per billion or parts or parts per undecillion is a substantial difference (if Google didn’t just lie to me, there are around one quattuordecillion molecules in our atmosphere, probably give or take a couple orders of magnitude).
removing/reducing
The kids still have exposure, but the total load is reduced allowing the body to see and react to the infectious elements without being overwhelmed. All of the “but it’s nature” fanatics should remember that the million years of evolution we have survived with exposure was done without enclosed, poorly ventilated boxes. And within the historical record, the some of the greatest failures of our “natural” immune system prior to vaccines and antibiotics have generally occurred when we enclosed people into poorly ventilated, densely packed communities. (though many failures come from drinking our own poo…usually due to densely packed populations with unregulated water standards/supplies)