What's this?
It's plastic.
What's this?
It's a power plant.
What's this?
It's a factory.
What's this?
It's pollution.
What's this?
It's harmful.
What's this?
It's chemical things.
What's this?
It's garbage.
What's this?
It's recycling.
What are they doing?
They're cleaning up.
What's this?
It's the Earth.
What's this?
It's air pollution.
