Emily Kwong (host, with guest Nell Greenfield‑Boyce also speaking within these segments)

It's called McCormick Place.

Oh, awesome.

I've gone to conferences at McCormick Place.

That's the one.

It's right on Lake Michigan, right?

And it's really big.

Yeah.

And a couple years ago, they had a big mass collision.

It made the news nationwide.

An unusual situation at McCormick Place today.

Nearly a thousand birds found dead.

I was talking to Tina Phillips.

She's with the Cornell Lab of Ornithology.

She told me this was kind of a watershed moment.

People who never even thought about birds were suddenly like, wait a minute, a thousand birds died in one night crashing into one building?

So after that high profile event, the convention center's managers decided to put on these decals that are just like a pattern of dots all over the windows.

And they had a lot of windows, OK, because they've got enough glass there to cover like two football fields.

But data taken before and after shows that this actually reduced bird collisions there by 95 percent.

Wow, that is a really big effect.

It made that much of a difference to have the windows, the full window, not just a small part of it, but the full window covered in these dots.