I was not being serious, but as you've repeatedly said, there's no evidence for the argument you're making.
A three-month change at the beginning of the year in PM2.5 is noise.
A three-month change at the beginning of the year in PM2.5 is noise.
You've yet to provide any for your assertions. Just feels.
I personally don't think the PM2.5 thing would justify the implementation of the system even if it were true, but that's not a debate I want to get into.
https://www.urbandictionary.com/define.php?term=schrodinger%...
The benefits of reducing PM2.5 pollution are... not in dispute. https://www.epa.gov/pm-pollution/health-and-environmental-ef...
I've been nothing but polite to you.