What is something that people think is dangerous but in reality is completely harmless?

Datman2020@lemmy.fmhy.ml to Asklemmy@lemmy.ml – 310 points –
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Dihydrogen monoxide except for when it completely replaces the air.

Oh, that shit is dangerous.

At high pressure it can cut through pretty much anything.

Heated to vapor can cause severe burns. (Steam)

A high percentage in the air when it's not enough will cause your body's cooling ability to fail. Killing you very quickly.

And that's just off the top of my head.

Not to mention it's potency as a solvent.

It also severely decreases function of you car brakes, which can lead to severe injuries or death.

drinking more than a liter (L) or so per hour for several hours can kill you