A whole lot of poorly configured or cheaply made electroninc appliances or chargers … yeah I can often literally hear when you’ve plugged something in wrong, it makes a high pitched whine, because it is overamping.
Also, if you’re near high tension power lines?
You have to be pretty darn close to be in danger from actual electromagnetic effects.
But… that hum? The buzz?
Turns out that that is actually what causes a lot of long term health problems in people sensitive to it.
Literally the sound, not the EM field, makes you agitated, stressed, on edge, and if that is just your baseline for 20 years, that constant stress accumulates and basically ages you faster, and can cause mental health problems.
Every social media platform that focused or focuses on posting pictures or video over text was objectively ruined when Boomers joined it.
If anyone can find an exception to that rule, I’d love to be proven wrong.