What is this?
Recycling bin
What is this?
Turning the light off
What is this?
Paper
What is this?
Plastic
What is this?
Recycling
What is this?
Public transportation
What is this?
Smog
What is this?
World
What is this?
Landfill
What is this?
Pollution
Who are they?
People
What is this?
River
What is this?
Metal
What is this?
Forest