(SciGirl) All this stuff could've been recycled, but it's just like taking a big trash bag like we had and just pouring it on our earth.

How many things are thrown in the trash that could've been recycled?

Not compostable, not recyclable, and not reusable.

That's what's trash.

♪ ♪ (knocking) Come in.

Hi, Mr. Moch.

My 2 friends and I want to know if we can kind of investigate the school and see if there's anything we can do to help the environment.

Yeah, we would love to have you and your friends come in.

Mr. Moch said I would love to have your friends help our school save money and save the environment.

Hi Peri!

Welcome to my school!

I call myself an environmentalist because I am very big on recycling.

Well, you should care about the environment because it's where we live.

Something I noticed about the cafeteria, there's a lot of wasted garbage.

Are these cups recyclable?

A lot of people don't know what exactly can be recycled and what is supposed to be thrown away.

(school bell rings) (Izzie) Lunch!

♪ ♪ (SciGirls) There's a lot of things that they can recycle.

Yeah, they could recycle those little yogurt cups.

We were investigating what kids threw away what, recycled what.

It looks like we've been wasting a lot of stuff that could've been recycled.

We are going to go sort out the trash outside to see what people wasted.

I think it's going to be kind of gross, but it's worth it-- it's science.

Whoa!

I guess we'll be doin' some trash talk!