'Air purifiers' are not all made equal.

I've been getting some legs under Dr Duncan and his comment on negative ion generators;

6. Biological Effects of Negative Air Ions on Human/Animal Health and Microorganism Growth as well as Plant Development

"Evidence has shown that NAIs could significantly reduce the level of serotonin in blood or brain, etc."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6213340/

= a brain chemical effect for sure.

eg;

https://airbutler.com/product_info.php?language=en&gm_boosted_product=AIRBUTLER-Watson&Medcare-Luftreiniger=AIRBUTLER-Watson.html&products_id=4&

" On mental health, exposure to NAIs showed highly significant increase in performance of all tested tasks (mirror drawing, rotary pursuit, visual reaction time, and auditory) [86], alleviating symptoms of seasonal affective disorder (SAD) [87]. Similar effects of NAIs on relieving symptoms in mood disorders to antidepressant nonpharmacotherapy trials were observed [38]. NAIs also showed effective treatment of chronic depression [88]. "

Now 3 countries ... soon more.

Spain UP
Argentina UP
New Zealand UP

Perhaps the most useful youtube channel in a long-time. Get hacking:

https://www.youtube.com/channel/UCQU7Xed9eB3eK0iYHWl4Wqg/videos

"And if we add to that, as part of this cocktail, the Neuro-rights that, at least here in Chile, are groundbreaking. Groundbreaking. This is the only country in the world where Neuro-rights have already been implemented. And now they want to implement them in Spain as well. "

https://www.orwell.city/2022/01/bio-hacking.html