Immediately dangerous to life or health

Okay kiddo, have you ever heard of something called IDLH? It's a really important thing that people talk about when they are working in places where the air might not be safe to breathe.

IDLH stands for "immediately dangerous to life or health." That means that if you were exposed to those things for too long, you could get hurt really badly or even die!

So let's say that you're working in a factory where they make chemicals. Some of those chemicals might be IDLH, which means that you need to be really careful when you're around them. You might need to wear special equipment like a mask or special suit to protect yourself.

It's really important that people stay away from things that are IDLH, because they can hurt you really quickly and without warning. So always make sure that you're being safe and following the rules when you're in a place where there might be IDLH things around!