PBS Anywhere

Providing Support for PBS.org

It’s Okay to Be Smart

Whose Air do we Share?

Video duration: 3:24

Earth's atmosphere is big, but not as big as many people think. All the air that keeps us alive is just a thin candy shell around our planet. In this episode, echoing the words of John F. Kennedy, I'll show you the science of how we all share the same air. So let's be careful about what we're putting in it.

Episodes of It’s Okay to Be Smart94

Video thumbnail: It’s Okay to Be Smart The Surprising Places We Waste Energy

It’s Okay to Be Smart

The Surprising Places We Waste Energy

We use a LOT of energy, but we waste a lot too.

3:26

The Surprising Places We Waste Energy

3:26

Video thumbnail: It’s Okay to Be Smart Does The Moon Really Orbit The Earth?

It’s Okay to Be Smart

Does The Moon Really Orbit The Earth?

What holds the moon up? Moonbeams!

2:44

Does The Moon Really Orbit The Earth?

2:44

Video thumbnail: It’s Okay to Be Smart What's The Loudest Possible Sound?

It’s Okay to Be Smart

What's The Loudest Possible Sound?

It's definitely higher than "11"

3:49

What's The Loudest Possible Sound?

3:49

Video thumbnail: It’s Okay to Be Smart Could We Clone Ourselves?

It’s Okay to Be Smart

Could We Clone Ourselves?

Just be yourself! Or be your other self. Whichever.

5:31

Could We Clone Ourselves?

5:31

See all Episodes