From the brains behind, brains on, this is the moment of um.

Moment of um comes to you from APM Studios. I'm Clyde, the cloud.

I've been floating up here in the sky for a while now, and to be honest, you humans are really confusing.

I'll watch you fill up your water bottles from your sink or the water fountain at the park.

Uh, hello?

Hi, up here, friendly rain-making, root-and-tooting cumulus cloud,

I'd drop rain down on you,

and you just let it sit there in puddles.

I don't understand.

Humans need to drink water, right?

So why can't you drink my rainwater?

Come to think of it, this is just what Ira was wondering about.

Is rainwater safe to drink?

I think we ought to ask an expert.

Generally, I would say no, but in emergency situations,

rainwater is safer to drink than water in like a little stagnant

lake. So my name is Dr. Johnson Sexton, and I'm a research professional at the University of Arizona,

and I study how germs move throughout the environment. So let's say you're camping and you

completely run out of water. Rainwater is great. So in

emergency situations, it's going to have less contaminants. But if you're in the city, I would say go to your tap.

Drink tap water as opposed to rainwater. And that's partly because there are chemicals in the air,

there are microbes in the air. So when the rain comes down, it can pick that up.

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