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I like to recommend what we did as young parents for the past many years:

Get a large room air purifier to simultaneously (1) generate a large spectral range of white noise while also (2) keeping plastic etc. dust out of their lungs (for almost half their life while they sleep so much).

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I also got a few of the Airthings View Plus boxes, one for each floor of the house and one in the bedroom specifically. Learned some very interesting things, such as that when the A/C comes on at night, the VOCs and CO2 spikes so we were able to address this properly. As an SRE style person, the idea was that without observability into the current state, we didn't really know where the problems were or what we should do to fix them (though perhaps the solution is always just "buy an air purifier").

>Get a large room air purifier

Better start removing the main sources of air pollution. Manufacturing and powering air purifier adds to pollution (and global warming) so it should definitely not be the priority.

These are different contexts; in terms of global air pollution, sure, but in terms of in-home exposure to pollutants and microplastic stuff, something that filters the air might help in the place you spend 1/2 or more of your life at.

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